./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.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_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya --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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:57:40,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:57:40,429 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:57:40,433 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:57:40,434 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:57:40,459 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:57:40,460 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:57:40,460 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:57:40,461 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:57:40,461 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:57:40,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:57:40,462 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:57:40,463 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:57:40,464 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:57:40,464 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:57:40,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:57:40,465 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:57:40,466 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:57:40,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:57:40,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:57:40,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:57:40,468 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:57:40,468 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:57:40,468 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:57:40,469 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:57:40,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:57:40,470 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:57:40,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:57:40,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:57:40,471 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:57:40,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:57:40,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:57:40,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:57:40,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:57:40,472 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:57:40,473 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:57:40,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:57:40,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:57:40,473 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:57:40,473 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:57:40,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:57:40,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:57:40,474 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_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2023-11-29 01:57:40,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:57:40,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:57:40,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:57:40,729 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:57:40,729 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:57:40,731 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2023-11-29 01:57:43,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:57:43,655 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:57:43,655 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/sv-benchmarks/c/array-patterns/array4_pattern.c [2023-11-29 01:57:43,662 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/data/96d123ae3/3db81f47db8d43f0b572a4c132b7cfa1/FLAG1d4af3535 [2023-11-29 01:57:43,673 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/data/96d123ae3/3db81f47db8d43f0b572a4c132b7cfa1 [2023-11-29 01:57:43,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:57:43,677 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:57:43,678 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:57:43,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:57:43,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:57:43,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5287db74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43, skipping insertion in model container [2023-11-29 01:57:43,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,702 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:57:43,824 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_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-11-29 01:57:43,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:57:43,854 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:57:43,864 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_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2023-11-29 01:57:43,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:57:43,888 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:57:43,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43 WrapperNode [2023-11-29 01:57:43,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:57:43,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:57:43,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:57:43,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:57:43,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,925 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2023-11-29 01:57:43,925 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:57:43,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:57:43,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:57:43,926 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:57:43,934 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,937 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,948 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2023-11-29 01:57:43,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,954 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,957 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:57:43,963 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:57:43,963 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:57:43,963 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:57:43,964 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (1/1) ... [2023-11-29 01:57:43,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:57:43,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:43,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:57:43,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:57:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:57:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:57:44,019 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:57:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:57:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:57:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:57:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:57:44,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:57:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:57:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:57:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:57:44,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:57:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:57:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:57:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:57:44,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:57:44,092 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:57:44,094 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:57:44,246 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:57:44,276 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:57:44,276 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 01:57:44,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:57:44 BoogieIcfgContainer [2023-11-29 01:57:44,277 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:57:44,280 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:57:44,280 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:57:44,284 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:57:44,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:57:43" (1/3) ... [2023-11-29 01:57:44,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f094028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:57:44, skipping insertion in model container [2023-11-29 01:57:44,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:57:43" (2/3) ... [2023-11-29 01:57:44,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f094028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:57:44, skipping insertion in model container [2023-11-29 01:57:44,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:57:44" (3/3) ... [2023-11-29 01:57:44,287 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2023-11-29 01:57:44,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:57:44,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:57:44,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:57:44,359 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;@6f9f64d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:57:44,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:57:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:57:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 01:57:44,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:44,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:57:44,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:44,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash -661786546, now seen corresponding path program 1 times [2023-11-29 01:57:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404967051] [2023-11-29 01:57:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 01:57:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:57:44,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404967051] [2023-11-29 01:57:44,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404967051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:44,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:44,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:57:44,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668894594] [2023-11-29 01:57:44,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:44,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:57:44,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:57:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:57:44,573 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:57:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:44,599 INFO L93 Difference]: Finished difference Result 54 states and 84 transitions. [2023-11-29 01:57:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:57:44,601 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-29 01:57:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:44,607 INFO L225 Difference]: With dead ends: 54 [2023-11-29 01:57:44,607 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 01:57:44,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:57:44,614 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:44,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:57:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 01:57:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 01:57:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:57:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-29 01:57:44,661 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2023-11-29 01:57:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:44,662 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-29 01:57:44,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 01:57:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-29 01:57:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:57:44,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:44,665 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:57:44,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:57:44,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:44,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:44,666 INFO L85 PathProgramCache]: Analyzing trace with hash -41868004, now seen corresponding path program 1 times [2023-11-29 01:57:44,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:44,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908163533] [2023-11-29 01:57:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:44,712 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:44,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286301923] [2023-11-29 01:57:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:44,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:44,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:44,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:57:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:44,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:57:44,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:57:44,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:57:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:44,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908163533] [2023-11-29 01:57:44,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:44,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286301923] [2023-11-29 01:57:44,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286301923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:44,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:57:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265126293] [2023-11-29 01:57:44,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:44,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:57:44,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:44,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:57:44,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:57:44,881 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:57:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:44,922 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2023-11-29 01:57:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:57:44,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-29 01:57:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:44,924 INFO L225 Difference]: With dead ends: 64 [2023-11-29 01:57:44,924 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 01:57:44,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:57:44,926 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:44,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:57:44,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 01:57:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2023-11-29 01:57:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 01:57:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2023-11-29 01:57:44,938 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 41 [2023-11-29 01:57:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:44,939 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2023-11-29 01:57:44,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:57:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2023-11-29 01:57:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:57:44,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:44,941 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:57:44,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:57:45,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:45,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:45,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash -851214630, now seen corresponding path program 1 times [2023-11-29 01:57:45,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:45,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39951009] [2023-11-29 01:57:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:45,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:45,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:45,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498256174] [2023-11-29 01:57:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:45,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:45,172 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:45,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:57:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:45,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:57:45,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:57:45,310 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:57:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:45,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39951009] [2023-11-29 01:57:45,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498256174] [2023-11-29 01:57:45,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498256174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:45,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:45,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:57:45,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529092587] [2023-11-29 01:57:45,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:45,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:57:45,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:45,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:57:45,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:57:45,314 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:57:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:45,340 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-11-29 01:57:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:57:45,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-11-29 01:57:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:45,342 INFO L225 Difference]: With dead ends: 40 [2023-11-29 01:57:45,342 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 01:57:45,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:57:45,344 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 69 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 [2023-11-29 01:57:45,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 69 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:57:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 01:57:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-29 01:57:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 01:57:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-11-29 01:57:45,353 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 41 [2023-11-29 01:57:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:45,353 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-11-29 01:57:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:57:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-11-29 01:57:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 01:57:45,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:45,355 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:57:45,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:57:45,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:45,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:45,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:45,561 INFO L85 PathProgramCache]: Analyzing trace with hash -585767715, now seen corresponding path program 1 times [2023-11-29 01:57:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:45,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278294552] [2023-11-29 01:57:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:45,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:45,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404232091] [2023-11-29 01:57:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:45,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:45,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:45,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:45,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:57:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:45,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:57:45,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:57:45,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:57:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:45,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278294552] [2023-11-29 01:57:45,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:45,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404232091] [2023-11-29 01:57:45,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404232091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:57:45,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:57:45,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:57:45,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90411239] [2023-11-29 01:57:45,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:57:45,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:57:45,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:45,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:57:45,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:57:45,747 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:57:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:45,841 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2023-11-29 01:57:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:57:45,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-11-29 01:57:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:45,843 INFO L225 Difference]: With dead ends: 71 [2023-11-29 01:57:45,843 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 01:57:45,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:57:45,845 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:45,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:57:45,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 01:57:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-11-29 01:57:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-29 01:57:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-11-29 01:57:45,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 42 [2023-11-29 01:57:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:45,869 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-11-29 01:57:45,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 01:57:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-11-29 01:57:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 01:57:45,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:45,871 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:57:45,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:57:46,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:46,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:46,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash -329442725, now seen corresponding path program 1 times [2023-11-29 01:57:46,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:46,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817968722] [2023-11-29 01:57:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:46,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:46,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:46,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445337821] [2023-11-29 01:57:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:46,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:46,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:46,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:46,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:57:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:46,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 01:57:46,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:46,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:57:47,042 INFO L349 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-11-29 01:57:47,042 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 2 case distinctions, treesize of input 26 treesize of output 27 [2023-11-29 01:57:47,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:57:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 01:57:47,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:47,285 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 33 treesize of output 31 [2023-11-29 01:57:47,289 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 53 treesize of output 51 [2023-11-29 01:57:47,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:47,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817968722] [2023-11-29 01:57:47,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445337821] [2023-11-29 01:57:47,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445337821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:47,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:57:47,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 01:57:47,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353957204] [2023-11-29 01:57:47,494 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:47,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:57:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:57:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:57:47,496 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 16 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 01:57:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:48,294 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2023-11-29 01:57:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:57:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 16 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2023-11-29 01:57:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:48,296 INFO L225 Difference]: With dead ends: 77 [2023-11-29 01:57:48,296 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 01:57:48,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 01:57:48,298 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:48,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 175 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:57:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 01:57:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2023-11-29 01:57:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:57:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-11-29 01:57:48,315 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 43 [2023-11-29 01:57:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:48,316 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-11-29 01:57:48,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 16 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 01:57:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-11-29 01:57:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 01:57:48,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:48,318 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:57:48,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 01:57:48,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:48,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:48,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:48,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1590707844, now seen corresponding path program 2 times [2023-11-29 01:57:48,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:48,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012173089] [2023-11-29 01:57:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:48,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:48,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:48,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711117794] [2023-11-29 01:57:48,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:57:48,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:48,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:48,545 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:48,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:57:48,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:57:48,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:48,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:57:48,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:57:48,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:57:48,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:48,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012173089] [2023-11-29 01:57:48,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:48,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711117794] [2023-11-29 01:57:48,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711117794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:48,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:57:48,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-29 01:57:48,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486648474] [2023-11-29 01:57:48,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:48,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:57:48,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:57:48,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:57:48,788 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:57:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:48,961 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2023-11-29 01:57:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:57:48,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 44 [2023-11-29 01:57:48,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:48,963 INFO L225 Difference]: With dead ends: 140 [2023-11-29 01:57:48,963 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 01:57:48,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:57:48,965 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 74 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:48,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 128 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:57:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 01:57:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2023-11-29 01:57:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 70 states have internal predecessors, (78), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-29 01:57:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-11-29 01:57:48,991 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 44 [2023-11-29 01:57:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:48,991 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-11-29 01:57:48,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:57:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-11-29 01:57:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 01:57:48,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:48,993 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:57:48,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:57:49,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:49,194 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:49,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash -973302627, now seen corresponding path program 3 times [2023-11-29 01:57:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:49,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215805790] [2023-11-29 01:57:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:49,217 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:49,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051620471] [2023-11-29 01:57:49,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:57:49,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:49,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:49,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:49,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:57:49,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 01:57:49,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:49,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 01:57:49,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:49,573 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 11 [2023-11-29 01:57:49,585 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 13 [2023-11-29 01:57:49,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:57:49,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-29 01:57:49,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:57:49,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2023-11-29 01:57:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 01:57:49,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:49,972 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 33 treesize of output 31 [2023-11-29 01:57:49,975 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 31 treesize of output 29 [2023-11-29 01:57:49,978 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 50 treesize of output 48 [2023-11-29 01:57:49,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2023-11-29 01:57:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 01:57:50,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:50,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215805790] [2023-11-29 01:57:50,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:50,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051620471] [2023-11-29 01:57:50,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051620471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:50,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:57:50,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-11-29 01:57:50,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148962407] [2023-11-29 01:57:50,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:57:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:57:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:57:50,347 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 01:57:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:51,567 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2023-11-29 01:57:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 01:57:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 44 [2023-11-29 01:57:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:51,569 INFO L225 Difference]: With dead ends: 130 [2023-11-29 01:57:51,570 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 01:57:51,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:57:51,572 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 130 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:51,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 167 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:57:51,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 01:57:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2023-11-29 01:57:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-29 01:57:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-11-29 01:57:51,590 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 44 [2023-11-29 01:57:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:51,591 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-11-29 01:57:51,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-29 01:57:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-11-29 01:57:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 01:57:51,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:51,592 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2023-11-29 01:57:51,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:57:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:51,794 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:51,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash -75528326, now seen corresponding path program 4 times [2023-11-29 01:57:51,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:51,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458251013] [2023-11-29 01:57:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:51,814 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:51,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950296466] [2023-11-29 01:57:51,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:57:51,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:51,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:51,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:51,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:57:51,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:57:51,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:51,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 01:57:51,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:51,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:57:51,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:57:52,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:57:52,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:57:53,092 INFO L349 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2023-11-29 01:57:53,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 68 [2023-11-29 01:57:53,159 INFO L349 Elim1Store]: treesize reduction 80, result has 36.0 percent of original size [2023-11-29 01:57:53,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 66 [2023-11-29 01:57:53,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:57:53,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2023-11-29 01:57:53,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:57:53,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 41 [2023-11-29 01:57:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:57:53,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:54,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458251013] [2023-11-29 01:57:54,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:54,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950296466] [2023-11-29 01:57:54,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950296466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:57:54,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:57:54,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-29 01:57:54,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869912457] [2023-11-29 01:57:54,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:54,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:57:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:57:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:57:54,030 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 01:57:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:54,557 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2023-11-29 01:57:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:57:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2023-11-29 01:57:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:54,559 INFO L225 Difference]: With dead ends: 89 [2023-11-29 01:57:54,559 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 01:57:54,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:57:54,561 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:54,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:57:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 01:57:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2023-11-29 01:57:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-29 01:57:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2023-11-29 01:57:54,584 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 45 [2023-11-29 01:57:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:54,584 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2023-11-29 01:57:54,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 01:57:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2023-11-29 01:57:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 01:57:54,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:54,585 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 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] [2023-11-29 01:57:54,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:57:54,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:54,786 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:54,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:54,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1985671229, now seen corresponding path program 5 times [2023-11-29 01:57:54,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:54,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923846491] [2023-11-29 01:57:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:54,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:54,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:54,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222714848] [2023-11-29 01:57:54,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:57:54,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:54,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:54,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:57:54,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 01:57:54,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:54,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:57:54,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:57:54,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:57:55,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923846491] [2023-11-29 01:57:55,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222714848] [2023-11-29 01:57:55,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222714848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:55,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:57:55,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-29 01:57:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941144346] [2023-11-29 01:57:55,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:55,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:57:55,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:57:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:57:55,035 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:57:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:55,368 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2023-11-29 01:57:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:57:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2023-11-29 01:57:55,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:55,370 INFO L225 Difference]: With dead ends: 178 [2023-11-29 01:57:55,370 INFO L226 Difference]: Without dead ends: 140 [2023-11-29 01:57:55,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:57:55,371 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:55,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 191 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:57:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-29 01:57:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2023-11-29 01:57:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 86 states have (on average 1.127906976744186) internal successors, (97), 87 states have internal predecessors, (97), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-29 01:57:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 163 transitions. [2023-11-29 01:57:55,400 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 163 transitions. Word has length 46 [2023-11-29 01:57:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:55,401 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 163 transitions. [2023-11-29 01:57:55,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:57:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 163 transitions. [2023-11-29 01:57:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 01:57:55,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:55,402 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 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] [2023-11-29 01:57:55,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 01:57:55,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:55,602 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:55,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash -349603524, now seen corresponding path program 6 times [2023-11-29 01:57:55,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:55,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194770376] [2023-11-29 01:57:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:55,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:55,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:55,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691657250] [2023-11-29 01:57:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:57:55,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:55,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:55,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:55,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:57:55,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 01:57:55,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:57:55,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:57:55,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:57:55,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:57:55,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194770376] [2023-11-29 01:57:55,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691657250] [2023-11-29 01:57:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691657250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:55,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:57:55,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-29 01:57:55,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842942756] [2023-11-29 01:57:55,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:55,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:57:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:57:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:57:55,887 INFO L87 Difference]: Start difference. First operand 125 states and 163 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:57:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:56,362 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2023-11-29 01:57:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:57:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2023-11-29 01:57:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:56,364 INFO L225 Difference]: With dead ends: 138 [2023-11-29 01:57:56,364 INFO L226 Difference]: Without dead ends: 134 [2023-11-29 01:57:56,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:57:56,365 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 71 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:56,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 220 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:57:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-29 01:57:56,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2023-11-29 01:57:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 88 states have internal predecessors, (98), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-29 01:57:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2023-11-29 01:57:56,398 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 46 [2023-11-29 01:57:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:57:56,398 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2023-11-29 01:57:56,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:57:56,398 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2023-11-29 01:57:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 01:57:56,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:57:56,399 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1] [2023-11-29 01:57:56,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:57:56,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:57:56,600 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:57:56,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:57:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2079274683, now seen corresponding path program 7 times [2023-11-29 01:57:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:57:56,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246020929] [2023-11-29 01:57:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:57:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:57:56,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:57:56,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147176100] [2023-11-29 01:57:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:57:56,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:57:56,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:57:56,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:57:56,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:57:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:57:56,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 01:57:56,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:56,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:57:56,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:57:56,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:57:56,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:57:56,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:57:56,880 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 26 treesize of output 28 [2023-11-29 01:57:56,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:57:56,898 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 26 treesize of output 28 [2023-11-29 01:57:58,635 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2023-11-29 01:57:58,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2023-11-29 01:57:58,757 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2023-11-29 01:57:58,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2023-11-29 01:57:59,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:57:59,546 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 96 treesize of output 52 [2023-11-29 01:57:59,552 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:57:59,553 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 147 treesize of output 79 [2023-11-29 01:57:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:57:59,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:00,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:00,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246020929] [2023-11-29 01:58:00,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:00,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147176100] [2023-11-29 01:58:00,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147176100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:00,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:58:00,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-11-29 01:58:00,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697754635] [2023-11-29 01:58:00,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:00,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:58:00,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:00,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:58:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:58:00,402 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:58:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:02,092 INFO L93 Difference]: Finished difference Result 163 states and 210 transitions. [2023-11-29 01:58:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 01:58:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 47 [2023-11-29 01:58:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:02,094 INFO L225 Difference]: With dead ends: 163 [2023-11-29 01:58:02,094 INFO L226 Difference]: Without dead ends: 159 [2023-11-29 01:58:02,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:58:02,096 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 104 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:02,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 211 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:58:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-29 01:58:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2023-11-29 01:58:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 102 states have internal predecessors, (114), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2023-11-29 01:58:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2023-11-29 01:58:02,145 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 47 [2023-11-29 01:58:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:02,145 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2023-11-29 01:58:02,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:58:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2023-11-29 01:58:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 01:58:02,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:02,146 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:02,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:58:02,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:58:02,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:02,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:02,347 INFO L85 PathProgramCache]: Analyzing trace with hash 65087772, now seen corresponding path program 8 times [2023-11-29 01:58:02,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:02,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206607326] [2023-11-29 01:58:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:02,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:02,363 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:02,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255560714] [2023-11-29 01:58:02,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:58:02,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:02,365 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:02,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:58:02,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:58:02,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:02,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:58:02,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:02,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:58:02,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:02,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206607326] [2023-11-29 01:58:02,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:02,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255560714] [2023-11-29 01:58:02,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255560714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:02,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:58:02,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-29 01:58:02,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624803815] [2023-11-29 01:58:02,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:02,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:58:02,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:02,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:58:02,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:58:02,615 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:03,014 INFO L93 Difference]: Finished difference Result 345 states and 454 transitions. [2023-11-29 01:58:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:58:03,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2023-11-29 01:58:03,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:03,017 INFO L225 Difference]: With dead ends: 345 [2023-11-29 01:58:03,017 INFO L226 Difference]: Without dead ends: 253 [2023-11-29 01:58:03,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:58:03,019 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 234 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:03,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 198 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:58:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-11-29 01:58:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 215. [2023-11-29 01:58:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 146 states have (on average 1.13013698630137) internal successors, (165), 147 states have internal predecessors, (165), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-29 01:58:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 287 transitions. [2023-11-29 01:58:03,110 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 287 transitions. Word has length 48 [2023-11-29 01:58:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:03,110 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 287 transitions. [2023-11-29 01:58:03,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:03,111 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 287 transitions. [2023-11-29 01:58:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 01:58:03,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:03,112 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:03,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:58:03,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:58:03,312 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:03,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash 686014461, now seen corresponding path program 9 times [2023-11-29 01:58:03,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:03,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930886830] [2023-11-29 01:58:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:03,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:03,328 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:03,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50154647] [2023-11-29 01:58:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:58:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:03,329 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:03,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:58:03,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 01:58:03,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:03,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:58:03,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:03,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:58:03,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:03,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930886830] [2023-11-29 01:58:03,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:03,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50154647] [2023-11-29 01:58:03,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50154647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:03,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:58:03,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-29 01:58:03,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406821626] [2023-11-29 01:58:03,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:03,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:58:03,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:58:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:58:03,571 INFO L87 Difference]: Start difference. First operand 215 states and 287 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:04,066 INFO L93 Difference]: Finished difference Result 239 states and 309 transitions. [2023-11-29 01:58:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:58:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2023-11-29 01:58:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:04,068 INFO L225 Difference]: With dead ends: 239 [2023-11-29 01:58:04,068 INFO L226 Difference]: Without dead ends: 235 [2023-11-29 01:58:04,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:58:04,069 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 77 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:04,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 395 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:58:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-29 01:58:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 216. [2023-11-29 01:58:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 147 states have (on average 1.129251700680272) internal successors, (166), 148 states have internal predecessors, (166), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-29 01:58:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2023-11-29 01:58:04,130 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 48 [2023-11-29 01:58:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:04,130 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2023-11-29 01:58:04,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2023-11-29 01:58:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 01:58:04,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:04,132 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:04,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:58:04,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:58:04,332 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:04,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:04,333 INFO L85 PathProgramCache]: Analyzing trace with hash -176306150, now seen corresponding path program 10 times [2023-11-29 01:58:04,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:04,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380152778] [2023-11-29 01:58:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:04,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:04,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:04,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714969966] [2023-11-29 01:58:04,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:58:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:04,354 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:04,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:58:04,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:58:04,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:04,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 01:58:04,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:04,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:04,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:04,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:58:04,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:58:04,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:04,666 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 26 treesize of output 28 [2023-11-29 01:58:04,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:04,682 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 26 treesize of output 28 [2023-11-29 01:58:04,733 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:04,733 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 33 treesize of output 38 [2023-11-29 01:58:04,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:04,750 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 33 treesize of output 38 [2023-11-29 01:58:06,609 INFO L349 Elim1Store]: treesize reduction 176, result has 33.6 percent of original size [2023-11-29 01:58:06,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 124 [2023-11-29 01:58:06,780 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2023-11-29 01:58:06,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2023-11-29 01:58:08,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:08,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 152 treesize of output 84 [2023-11-29 01:58:08,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:08,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 243 treesize of output 127 [2023-11-29 01:58:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:08,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:10,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380152778] [2023-11-29 01:58:10,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:10,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714969966] [2023-11-29 01:58:10,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714969966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:10,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:58:10,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-29 01:58:10,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095622605] [2023-11-29 01:58:10,363 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:10,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 01:58:10,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 01:58:10,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:58:10,366 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:58:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:11,623 INFO L93 Difference]: Finished difference Result 254 states and 335 transitions. [2023-11-29 01:58:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:58:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2023-11-29 01:58:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:11,626 INFO L225 Difference]: With dead ends: 254 [2023-11-29 01:58:11,626 INFO L226 Difference]: Without dead ends: 250 [2023-11-29 01:58:11,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=286, Invalid=1694, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 01:58:11,628 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:11,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 226 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:58:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-29 01:58:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 235. [2023-11-29 01:58:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 162 states have internal predecessors, (182), 65 states have call successors, (65), 8 states have call predecessors, (65), 8 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-29 01:58:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 312 transitions. [2023-11-29 01:58:11,691 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 312 transitions. Word has length 49 [2023-11-29 01:58:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:11,692 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 312 transitions. [2023-11-29 01:58:11,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:58:11,692 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 312 transitions. [2023-11-29 01:58:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 01:58:11,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:11,693 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:11,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:58:11,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:58:11,893 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:11,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1138441315, now seen corresponding path program 11 times [2023-11-29 01:58:11,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:11,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616310732] [2023-11-29 01:58:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:11,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:11,908 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:11,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867695656] [2023-11-29 01:58:11,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:58:11,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:11,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:11,909 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:11,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:58:12,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 01:58:12,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:12,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:58:12,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:12,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:58:12,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:12,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616310732] [2023-11-29 01:58:12,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:12,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867695656] [2023-11-29 01:58:12,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867695656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:12,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:58:12,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-11-29 01:58:12,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912762025] [2023-11-29 01:58:12,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:12,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:58:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:58:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:58:12,204 INFO L87 Difference]: Start difference. First operand 235 states and 312 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:13,000 INFO L93 Difference]: Finished difference Result 588 states and 785 transitions. [2023-11-29 01:58:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:58:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2023-11-29 01:58:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:13,004 INFO L225 Difference]: With dead ends: 588 [2023-11-29 01:58:13,004 INFO L226 Difference]: Without dead ends: 422 [2023-11-29 01:58:13,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:58:13,006 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 404 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:13,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 271 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:58:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-11-29 01:58:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 327. [2023-11-29 01:58:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 220 states have (on average 1.1318181818181818) internal successors, (249), 221 states have internal predecessors, (249), 97 states have call successors, (97), 9 states have call predecessors, (97), 9 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2023-11-29 01:58:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 443 transitions. [2023-11-29 01:58:13,105 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 443 transitions. Word has length 50 [2023-11-29 01:58:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:13,106 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 443 transitions. [2023-11-29 01:58:13,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 443 transitions. [2023-11-29 01:58:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 01:58:13,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:13,107 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:13,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:58:13,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:58:13,308 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:13,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash 930416860, now seen corresponding path program 12 times [2023-11-29 01:58:13,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:13,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245609771] [2023-11-29 01:58:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:13,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:13,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:13,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173006356] [2023-11-29 01:58:13,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:58:13,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:13,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:13,329 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:13,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:58:13,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 01:58:13,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:13,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:58:13,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:13,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:58:13,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:13,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245609771] [2023-11-29 01:58:13,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:13,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173006356] [2023-11-29 01:58:13,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173006356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:13,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:58:13,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-11-29 01:58:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256321215] [2023-11-29 01:58:13,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:13,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:58:13,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:13,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:58:13,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:58:13,972 INFO L87 Difference]: Start difference. First operand 327 states and 443 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:14,651 INFO L93 Difference]: Finished difference Result 365 states and 478 transitions. [2023-11-29 01:58:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:58:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2023-11-29 01:58:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:14,654 INFO L225 Difference]: With dead ends: 365 [2023-11-29 01:58:14,654 INFO L226 Difference]: Without dead ends: 361 [2023-11-29 01:58:14,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:58:14,655 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 143 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:14,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 446 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:58:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-11-29 01:58:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 328. [2023-11-29 01:58:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 221 states have (on average 1.1312217194570136) internal successors, (250), 222 states have internal predecessors, (250), 97 states have call successors, (97), 9 states have call predecessors, (97), 9 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2023-11-29 01:58:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 444 transitions. [2023-11-29 01:58:14,747 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 444 transitions. Word has length 50 [2023-11-29 01:58:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:14,748 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 444 transitions. [2023-11-29 01:58:14,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 444 transitions. [2023-11-29 01:58:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 01:58:14,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:14,749 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:14,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:58:14,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:58:14,949 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:14,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1189766373, now seen corresponding path program 13 times [2023-11-29 01:58:14,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:14,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835463405] [2023-11-29 01:58:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:14,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:14,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:14,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534264252] [2023-11-29 01:58:14,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:58:14,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:14,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:14,965 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:14,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:58:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:15,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 01:58:15,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:15,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:15,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:58:15,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:58:15,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:58:15,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:15,316 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 26 treesize of output 28 [2023-11-29 01:58:15,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:15,330 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 26 treesize of output 28 [2023-11-29 01:58:15,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:15,402 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 33 treesize of output 38 [2023-11-29 01:58:15,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:15,421 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 33 treesize of output 38 [2023-11-29 01:58:15,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:15,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 01:58:15,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:15,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 01:58:18,150 INFO L349 Elim1Store]: treesize reduction 200, result has 35.7 percent of original size [2023-11-29 01:58:18,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 150 [2023-11-29 01:58:18,372 INFO L349 Elim1Store]: treesize reduction 220, result has 33.5 percent of original size [2023-11-29 01:58:18,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 84 treesize of output 152 [2023-11-29 01:58:21,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:21,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 113 [2023-11-29 01:58:21,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:21,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 279 treesize of output 163 [2023-11-29 01:58:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:58:21,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:22,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835463405] [2023-11-29 01:58:22,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:22,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534264252] [2023-11-29 01:58:22,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534264252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:22,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:58:22,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-11-29 01:58:22,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188430099] [2023-11-29 01:58:22,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:22,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 01:58:22,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 01:58:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 01:58:22,777 INFO L87 Difference]: Start difference. First operand 328 states and 444 transitions. Second operand has 30 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:58:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:27,130 INFO L93 Difference]: Finished difference Result 369 states and 494 transitions. [2023-11-29 01:58:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 01:58:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2023-11-29 01:58:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:27,134 INFO L225 Difference]: With dead ends: 369 [2023-11-29 01:58:27,134 INFO L226 Difference]: Without dead ends: 365 [2023-11-29 01:58:27,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=391, Invalid=3269, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 01:58:27,136 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 105 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:27,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 312 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 01:58:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-11-29 01:58:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 347. [2023-11-29 01:58:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 235 states have (on average 1.1319148936170214) internal successors, (266), 236 states have internal predecessors, (266), 101 states have call successors, (101), 10 states have call predecessors, (101), 10 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-29 01:58:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 468 transitions. [2023-11-29 01:58:27,245 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 468 transitions. Word has length 51 [2023-11-29 01:58:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:27,245 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 468 transitions. [2023-11-29 01:58:27,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:58:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 468 transitions. [2023-11-29 01:58:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 01:58:27,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:27,247 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:27,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:58:27,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:58:27,447 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:27,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1804030140, now seen corresponding path program 14 times [2023-11-29 01:58:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:27,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271862483] [2023-11-29 01:58:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:27,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:27,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:27,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752876986] [2023-11-29 01:58:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:58:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:27,465 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:27,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:58:27,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:58:27,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:27,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:58:27,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:27,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:58:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271862483] [2023-11-29 01:58:27,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752876986] [2023-11-29 01:58:27,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752876986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:27,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:58:27,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-11-29 01:58:27,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614737373] [2023-11-29 01:58:27,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:27,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:58:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:58:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:58:27,807 INFO L87 Difference]: Start difference. First operand 347 states and 468 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:28,967 INFO L93 Difference]: Finished difference Result 907 states and 1222 transitions. [2023-11-29 01:58:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 01:58:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2023-11-29 01:58:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:28,971 INFO L225 Difference]: With dead ends: 907 [2023-11-29 01:58:28,971 INFO L226 Difference]: Without dead ends: 645 [2023-11-29 01:58:28,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 01:58:28,973 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 659 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:28,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 372 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:58:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2023-11-29 01:58:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 461. [2023-11-29 01:58:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 308 states have (on average 1.1331168831168832) internal successors, (349), 309 states have internal predecessors, (349), 141 states have call successors, (141), 11 states have call predecessors, (141), 11 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2023-11-29 01:58:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 631 transitions. [2023-11-29 01:58:29,186 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 631 transitions. Word has length 52 [2023-11-29 01:58:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:29,186 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 631 transitions. [2023-11-29 01:58:29,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 631 transitions. [2023-11-29 01:58:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 01:58:29,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:29,188 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:29,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:29,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:58:29,389 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:29,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1514124125, now seen corresponding path program 15 times [2023-11-29 01:58:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469353299] [2023-11-29 01:58:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:29,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:29,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44616379] [2023-11-29 01:58:29,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:58:29,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:29,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:29,406 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:29,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:58:29,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 01:58:29,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:29,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:58:29,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:29,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:58:29,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:29,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469353299] [2023-11-29 01:58:29,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:29,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44616379] [2023-11-29 01:58:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44616379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:29,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:58:29,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-11-29 01:58:29,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84630041] [2023-11-29 01:58:29,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:29,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:58:29,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:29,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:58:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:58:29,812 INFO L87 Difference]: Start difference. First operand 461 states and 631 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:31,210 INFO L93 Difference]: Finished difference Result 516 states and 682 transitions. [2023-11-29 01:58:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:58:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2023-11-29 01:58:31,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:31,214 INFO L225 Difference]: With dead ends: 516 [2023-11-29 01:58:31,214 INFO L226 Difference]: Without dead ends: 512 [2023-11-29 01:58:31,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-11-29 01:58:31,215 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 144 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:31,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 847 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:58:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-11-29 01:58:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 462. [2023-11-29 01:58:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 309 states have (on average 1.132686084142395) internal successors, (350), 310 states have internal predecessors, (350), 141 states have call successors, (141), 11 states have call predecessors, (141), 11 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2023-11-29 01:58:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 632 transitions. [2023-11-29 01:58:31,352 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 632 transitions. Word has length 52 [2023-11-29 01:58:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:31,352 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 632 transitions. [2023-11-29 01:58:31,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 632 transitions. [2023-11-29 01:58:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 01:58:31,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:31,353 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:31,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:31,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:31,554 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:31,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:31,554 INFO L85 PathProgramCache]: Analyzing trace with hash -274710342, now seen corresponding path program 16 times [2023-11-29 01:58:31,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:31,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815463077] [2023-11-29 01:58:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:31,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:31,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:31,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429307979] [2023-11-29 01:58:31,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:58:31,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:31,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:31,573 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:31,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:58:31,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:58:31,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:31,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 113 conjunts are in the unsatisfiable core [2023-11-29 01:58:31,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:31,953 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 11 [2023-11-29 01:58:31,959 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 11 [2023-11-29 01:58:31,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-11-29 01:58:32,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-11-29 01:58:32,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:32,044 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 38 treesize of output 40 [2023-11-29 01:58:32,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:32,058 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 38 treesize of output 40 [2023-11-29 01:58:32,121 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:32,121 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 49 treesize of output 54 [2023-11-29 01:58:32,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:32,146 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 49 treesize of output 54 [2023-11-29 01:58:32,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:32,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 68 [2023-11-29 01:58:32,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:32,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 68 [2023-11-29 01:58:32,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:32,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 80 [2023-11-29 01:58:32,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:32,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 80 [2023-11-29 01:58:37,370 INFO L349 Elim1Store]: treesize reduction 624, result has 31.2 percent of original size [2023-11-29 01:58:37,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 15 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 212 treesize of output 348 [2023-11-29 01:58:38,052 INFO L349 Elim1Store]: treesize reduction 588, result has 32.5 percent of original size [2023-11-29 01:58:38,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 15 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 212 treesize of output 346 [2023-11-29 01:58:46,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:46,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 133 [2023-11-29 01:58:46,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:58:46,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 399 treesize of output 223 [2023-11-29 01:58:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:58:46,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:49,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:49,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815463077] [2023-11-29 01:58:49,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:49,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429307979] [2023-11-29 01:58:49,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429307979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:49,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:58:49,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-11-29 01:58:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56405538] [2023-11-29 01:58:49,557 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:49,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 01:58:49,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:49,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 01:58:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2151, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:58:49,560 INFO L87 Difference]: Start difference. First operand 462 states and 632 transitions. Second operand has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:58:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:53,587 INFO L93 Difference]: Finished difference Result 508 states and 686 transitions. [2023-11-29 01:58:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 01:58:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2023-11-29 01:58:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:53,591 INFO L225 Difference]: With dead ends: 508 [2023-11-29 01:58:53,591 INFO L226 Difference]: Without dead ends: 504 [2023-11-29 01:58:53,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=358, Invalid=2612, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 01:58:53,593 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 42 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:53,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 356 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 01:58:53,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-11-29 01:58:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 485. [2023-11-29 01:58:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 326 states have (on average 1.1319018404907975) internal successors, (369), 327 states have internal predecessors, (369), 145 states have call successors, (145), 13 states have call predecessors, (145), 13 states have return successors, (145), 144 states have call predecessors, (145), 145 states have call successors, (145) [2023-11-29 01:58:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 659 transitions. [2023-11-29 01:58:53,769 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 659 transitions. Word has length 53 [2023-11-29 01:58:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:53,769 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 659 transitions. [2023-11-29 01:58:53,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:58:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 659 transitions. [2023-11-29 01:58:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 01:58:53,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:53,770 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:53,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:58:53,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:53,971 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:53,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash 105996029, now seen corresponding path program 17 times [2023-11-29 01:58:53,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:53,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365613279] [2023-11-29 01:58:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:53,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:53,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:53,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715850867] [2023-11-29 01:58:53,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:58:53,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:53,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:53,993 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:53,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:58:54,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 01:58:54,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:54,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:58:54,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:54,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:58:54,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:54,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365613279] [2023-11-29 01:58:54,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:54,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715850867] [2023-11-29 01:58:54,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715850867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:54,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:58:54,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-11-29 01:58:54,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679568911] [2023-11-29 01:58:54,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:54,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 01:58:54,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 01:58:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:58:54,509 INFO L87 Difference]: Start difference. First operand 485 states and 659 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:56,404 INFO L93 Difference]: Finished difference Result 1307 states and 1769 transitions. [2023-11-29 01:58:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 01:58:56,405 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2023-11-29 01:58:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:56,411 INFO L225 Difference]: With dead ends: 1307 [2023-11-29 01:58:56,411 INFO L226 Difference]: Without dead ends: 927 [2023-11-29 01:58:56,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=648, Invalid=2108, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:58:56,413 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 621 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:56,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 617 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 01:58:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2023-11-29 01:58:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 621. [2023-11-29 01:58:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 413 states have (on average 1.1331719128329298) internal successors, (468), 414 states have internal predecessors, (468), 193 states have call successors, (193), 14 states have call predecessors, (193), 14 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2023-11-29 01:58:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 854 transitions. [2023-11-29 01:58:56,653 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 854 transitions. Word has length 54 [2023-11-29 01:58:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:56,653 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 854 transitions. [2023-11-29 01:58:56,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 854 transitions. [2023-11-29 01:58:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 01:58:56,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:56,655 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:56,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:58:56,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 01:58:56,856 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:56,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash -291155844, now seen corresponding path program 18 times [2023-11-29 01:58:56,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:56,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844025893] [2023-11-29 01:58:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:56,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:56,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:56,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099590892] [2023-11-29 01:58:56,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:58:56,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:56,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:56,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:56,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:58:57,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 01:58:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:57,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:58:57,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:58:57,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:58:57,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844025893] [2023-11-29 01:58:57,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099590892] [2023-11-29 01:58:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099590892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:57,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:58:57,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2023-11-29 01:58:57,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47110322] [2023-11-29 01:58:57,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:57,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 01:58:57,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 01:58:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:58:57,806 INFO L87 Difference]: Start difference. First operand 621 states and 854 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:59,470 INFO L93 Difference]: Finished difference Result 696 states and 924 transitions. [2023-11-29 01:58:59,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:58:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2023-11-29 01:58:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:59,475 INFO L225 Difference]: With dead ends: 696 [2023-11-29 01:58:59,475 INFO L226 Difference]: Without dead ends: 692 [2023-11-29 01:58:59,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:58:59,477 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 195 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:59,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 741 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:58:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2023-11-29 01:58:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 622. [2023-11-29 01:58:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 414 states have (on average 1.1328502415458936) internal successors, (469), 415 states have internal predecessors, (469), 193 states have call successors, (193), 14 states have call predecessors, (193), 14 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2023-11-29 01:58:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 855 transitions. [2023-11-29 01:58:59,681 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 855 transitions. Word has length 54 [2023-11-29 01:58:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:59,681 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 855 transitions. [2023-11-29 01:58:59,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:58:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 855 transitions. [2023-11-29 01:58:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 01:58:59,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:59,683 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:59,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:58:59,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:59,883 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:59,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash -403814533, now seen corresponding path program 19 times [2023-11-29 01:58:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:59,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299552927] [2023-11-29 01:58:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:59,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:59,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033366297] [2023-11-29 01:58:59,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:58:59,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:59,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:59,901 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:59,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:59:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:00,194 WARN L260 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 124 conjunts are in the unsatisfiable core [2023-11-29 01:59:00,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:00,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:00,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:00,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:59:00,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:59:00,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,347 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 26 treesize of output 28 [2023-11-29 01:59:00,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,359 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 26 treesize of output 28 [2023-11-29 01:59:00,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,417 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 33 treesize of output 38 [2023-11-29 01:59:00,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,438 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 33 treesize of output 38 [2023-11-29 01:59:00,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 01:59:00,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 01:59:00,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 01:59:00,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 01:59:00,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 01:59:00,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:00,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 01:59:04,832 INFO L349 Elim1Store]: treesize reduction 280, result has 35.6 percent of original size [2023-11-29 01:59:04,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 206 [2023-11-29 01:59:05,172 INFO L349 Elim1Store]: treesize reduction 308, result has 33.5 percent of original size [2023-11-29 01:59:05,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 112 treesize of output 208 [2023-11-29 01:59:13,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:13,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 330 treesize of output 166 [2023-11-29 01:59:13,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:13,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 573 treesize of output 297 [2023-11-29 01:59:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 01:59:13,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:17,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:17,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299552927] [2023-11-29 01:59:17,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:17,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033366297] [2023-11-29 01:59:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033366297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:17,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:59:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-11-29 01:59:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749705707] [2023-11-29 01:59:17,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:17,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 01:59:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 01:59:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2502, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:59:17,469 INFO L87 Difference]: Start difference. First operand 622 states and 855 transitions. Second operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 30 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:59:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:25,921 INFO L93 Difference]: Finished difference Result 667 states and 909 transitions. [2023-11-29 01:59:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 01:59:25,922 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.21875) internal successors, (39), 30 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 55 [2023-11-29 01:59:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:25,925 INFO L225 Difference]: With dead ends: 667 [2023-11-29 01:59:25,925 INFO L226 Difference]: Without dead ends: 663 [2023-11-29 01:59:25,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=526, Invalid=5024, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 01:59:25,929 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 101 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:25,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 465 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 01:59:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-11-29 01:59:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 641. [2023-11-29 01:59:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 428 states have (on average 1.1331775700934579) internal successors, (485), 429 states have internal predecessors, (485), 197 states have call successors, (197), 15 states have call predecessors, (197), 15 states have return successors, (197), 196 states have call predecessors, (197), 197 states have call successors, (197) [2023-11-29 01:59:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 879 transitions. [2023-11-29 01:59:26,165 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 879 transitions. Word has length 55 [2023-11-29 01:59:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:26,165 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 879 transitions. [2023-11-29 01:59:26,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.21875) internal successors, (39), 30 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 01:59:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 879 transitions. [2023-11-29 01:59:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 01:59:26,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:26,166 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:26,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 01:59:26,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:26,367 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:59:26,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash 398733404, now seen corresponding path program 20 times [2023-11-29 01:59:26,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:26,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690911361] [2023-11-29 01:59:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:26,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:26,387 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:26,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432277170] [2023-11-29 01:59:26,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:59:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:26,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:26,390 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:26,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:59:26,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:59:26,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:26,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:59:26,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:59:26,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:59:26,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:26,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690911361] [2023-11-29 01:59:26,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:26,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432277170] [2023-11-29 01:59:26,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432277170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:26,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:59:26,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-11-29 01:59:26,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083220478] [2023-11-29 01:59:26,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:26,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 01:59:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 01:59:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:59:26,924 INFO L87 Difference]: Start difference. First operand 641 states and 879 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:59:29,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:29,413 INFO L93 Difference]: Finished difference Result 1781 states and 2421 transitions. [2023-11-29 01:59:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 01:59:29,413 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-11-29 01:59:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:29,421 INFO L225 Difference]: With dead ends: 1781 [2023-11-29 01:59:29,421 INFO L226 Difference]: Without dead ends: 1261 [2023-11-29 01:59:29,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=921, Invalid=3239, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 01:59:29,425 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 908 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:29,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 758 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 01:59:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2023-11-29 01:59:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 799. [2023-11-29 01:59:29,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 529 states have (on average 1.1342155009451795) internal successors, (600), 530 states have internal predecessors, (600), 253 states have call successors, (253), 16 states have call predecessors, (253), 16 states have return successors, (253), 252 states have call predecessors, (253), 253 states have call successors, (253) [2023-11-29 01:59:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1106 transitions. [2023-11-29 01:59:29,739 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1106 transitions. Word has length 56 [2023-11-29 01:59:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:29,740 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1106 transitions. [2023-11-29 01:59:29,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:59:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1106 transitions. [2023-11-29 01:59:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 01:59:29,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:29,741 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:29,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 01:59:29,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:29,942 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:59:29,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:29,942 INFO L85 PathProgramCache]: Analyzing trace with hash 971927229, now seen corresponding path program 21 times [2023-11-29 01:59:29,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:29,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028312801] [2023-11-29 01:59:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:29,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:29,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:29,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199851528] [2023-11-29 01:59:29,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:59:29,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:29,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:29,962 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:29,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:59:30,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 01:59:30,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:30,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:59:30,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:59:30,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 01:59:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028312801] [2023-11-29 01:59:30,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:59:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199851528] [2023-11-29 01:59:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199851528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:30,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:59:30,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2023-11-29 01:59:30,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189122497] [2023-11-29 01:59:30,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 01:59:30,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:30,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 01:59:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:59:30,498 INFO L87 Difference]: Start difference. First operand 799 states and 1106 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:59:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:32,144 INFO L93 Difference]: Finished difference Result 897 states and 1198 transitions. [2023-11-29 01:59:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:59:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-11-29 01:59:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:32,149 INFO L225 Difference]: With dead ends: 897 [2023-11-29 01:59:32,149 INFO L226 Difference]: Without dead ends: 893 [2023-11-29 01:59:32,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:59:32,150 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 211 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:32,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 933 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:59:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2023-11-29 01:59:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 800. [2023-11-29 01:59:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 530 states have (on average 1.1339622641509435) internal successors, (601), 531 states have internal predecessors, (601), 253 states have call successors, (253), 16 states have call predecessors, (253), 16 states have return successors, (253), 252 states have call predecessors, (253), 253 states have call successors, (253) [2023-11-29 01:59:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1107 transitions. [2023-11-29 01:59:32,427 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1107 transitions. Word has length 56 [2023-11-29 01:59:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:32,428 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1107 transitions. [2023-11-29 01:59:32,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 01:59:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1107 transitions. [2023-11-29 01:59:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 01:59:32,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:32,429 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:32,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 01:59:32,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:59:32,630 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:59:32,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 97055066, now seen corresponding path program 22 times [2023-11-29 01:59:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:32,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232910100] [2023-11-29 01:59:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:32,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:59:32,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346049193] [2023-11-29 01:59:32,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:59:32,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:32,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:32,647 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:32,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:59:33,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:59:33,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:33,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 124 conjunts are in the unsatisfiable core [2023-11-29 01:59:33,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:33,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:33,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 01:59:33,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:59:33,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 01:59:33,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,344 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 26 treesize of output 28 [2023-11-29 01:59:33,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,355 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 26 treesize of output 28 [2023-11-29 01:59:33,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,412 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 33 treesize of output 38 [2023-11-29 01:59:33,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,425 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 33 treesize of output 38 [2023-11-29 01:59:33,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 01:59:33,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 01:59:33,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 01:59:33,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 01:59:33,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 01:59:33,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 01:59:33,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 01:59:33,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:33,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 01:59:37,424 INFO L349 Elim1Store]: treesize reduction 320, result has 35.6 percent of original size [2023-11-29 01:59:37,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 126 treesize of output 234 [2023-11-29 01:59:37,890 INFO L349 Elim1Store]: treesize reduction 352, result has 33.5 percent of original size [2023-11-29 01:59:37,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 126 treesize of output 236 [2023-11-29 01:59:50,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:50,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 406 treesize of output 202 [2023-11-29 01:59:50,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:59:50,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 737 treesize of output 373 [2023-11-29 01:59:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:59:51,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:00,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:00,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232910100] [2023-11-29 02:00:00,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:00,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346049193] [2023-11-29 02:00:00,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346049193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:00,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:00,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-11-29 02:00:00,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456177342] [2023-11-29 02:00:00,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:00,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:00:00,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:00,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:00:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1551, Unknown=1, NotChecked=0, Total=1806 [2023-11-29 02:00:00,695 INFO L87 Difference]: Start difference. First operand 800 states and 1107 transitions. Second operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 02:00:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:04,809 INFO L93 Difference]: Finished difference Result 844 states and 1160 transitions. [2023-11-29 02:00:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:00:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 57 [2023-11-29 02:00:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:04,813 INFO L225 Difference]: With dead ends: 844 [2023-11-29 02:00:04,814 INFO L226 Difference]: Without dead ends: 840 [2023-11-29 02:00:04,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=299, Invalid=1862, Unknown=1, NotChecked=0, Total=2162 [2023-11-29 02:00:04,815 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 40 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:04,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 379 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 02:00:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-11-29 02:00:05,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 819. [2023-11-29 02:00:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 544 states have (on average 1.1341911764705883) internal successors, (617), 545 states have internal predecessors, (617), 257 states have call successors, (257), 17 states have call predecessors, (257), 17 states have return successors, (257), 256 states have call predecessors, (257), 257 states have call successors, (257) [2023-11-29 02:00:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1131 transitions. [2023-11-29 02:00:05,168 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1131 transitions. Word has length 57 [2023-11-29 02:00:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:05,168 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1131 transitions. [2023-11-29 02:00:05,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-29 02:00:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1131 transitions. [2023-11-29 02:00:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 02:00:05,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:05,170 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:05,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:00:05,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 02:00:05,370 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:05,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:05,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1254178211, now seen corresponding path program 23 times [2023-11-29 02:00:05,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:05,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508300281] [2023-11-29 02:00:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:05,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:05,386 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:05,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376348577] [2023-11-29 02:00:05,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:00:05,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:05,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:05,388 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:05,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:00:05,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 02:00:05,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:05,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:00:05,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 61 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:00:06,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:00:06,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:06,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508300281] [2023-11-29 02:00:06,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:06,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376348577] [2023-11-29 02:00:06,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376348577] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:06,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:00:06,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2023-11-29 02:00:06,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929453917] [2023-11-29 02:00:06,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:06,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:00:06,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:06,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:00:06,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:00:06,280 INFO L87 Difference]: Start difference. First operand 819 states and 1131 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:00:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:09,319 INFO L93 Difference]: Finished difference Result 2334 states and 3182 transitions. [2023-11-29 02:00:09,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 02:00:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-11-29 02:00:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:09,327 INFO L225 Difference]: With dead ends: 2334 [2023-11-29 02:00:09,327 INFO L226 Difference]: Without dead ends: 1652 [2023-11-29 02:00:09,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1257, Invalid=4749, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 02:00:09,331 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 1465 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 1116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1116 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:09,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1501 Valid, 764 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1116 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 02:00:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2023-11-29 02:00:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 999. [2023-11-29 02:00:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 659 states have (on average 1.1350531107739) internal successors, (748), 660 states have internal predecessors, (748), 321 states have call successors, (321), 18 states have call predecessors, (321), 18 states have return successors, (321), 320 states have call predecessors, (321), 321 states have call successors, (321) [2023-11-29 02:00:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1390 transitions. [2023-11-29 02:00:09,720 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1390 transitions. Word has length 58 [2023-11-29 02:00:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:09,721 INFO L495 AbstractCegarLoop]: Abstraction has 999 states and 1390 transitions. [2023-11-29 02:00:09,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:00:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1390 transitions. [2023-11-29 02:00:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 02:00:09,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:09,722 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:09,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 02:00:09,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:00:09,923 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:09,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash -665038820, now seen corresponding path program 24 times [2023-11-29 02:00:09,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:09,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964052628] [2023-11-29 02:00:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:09,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:09,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:09,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141939119] [2023-11-29 02:00:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:00:09,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:09,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:09,938 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:09,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 02:00:11,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-29 02:00:11,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:00:11,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:00:11,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 52 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:00:11,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:00:11,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:11,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964052628] [2023-11-29 02:00:11,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:11,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141939119] [2023-11-29 02:00:11,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141939119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:00:11,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:00:11,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2023-11-29 02:00:11,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36717824] [2023-11-29 02:00:11,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:11,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:00:11,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:11,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:00:11,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:00:11,684 INFO L87 Difference]: Start difference. First operand 999 states and 1390 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:00:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:00:13,393 INFO L93 Difference]: Finished difference Result 1123 states and 1507 transitions. [2023-11-29 02:00:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:00:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-11-29 02:00:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:00:13,398 INFO L225 Difference]: With dead ends: 1123 [2023-11-29 02:00:13,398 INFO L226 Difference]: Without dead ends: 1119 [2023-11-29 02:00:13,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 02:00:13,399 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 290 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:00:13,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 895 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:00:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2023-11-29 02:00:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1000. [2023-11-29 02:00:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 660 states have (on average 1.1348484848484848) internal successors, (749), 661 states have internal predecessors, (749), 321 states have call successors, (321), 18 states have call predecessors, (321), 18 states have return successors, (321), 320 states have call predecessors, (321), 321 states have call successors, (321) [2023-11-29 02:00:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1391 transitions. [2023-11-29 02:00:13,755 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1391 transitions. Word has length 58 [2023-11-29 02:00:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:13,755 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1391 transitions. [2023-11-29 02:00:13,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:00:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1391 transitions. [2023-11-29 02:00:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 02:00:13,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:13,756 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:00:13,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-29 02:00:13,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:00:13,957 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:13,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash 890715099, now seen corresponding path program 25 times [2023-11-29 02:00:13,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:13,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374837865] [2023-11-29 02:00:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:13,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:13,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:13,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688794029] [2023-11-29 02:00:13,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:00:13,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:13,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:13,973 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:13,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 02:00:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:14,449 WARN L260 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 144 conjunts are in the unsatisfiable core [2023-11-29 02:00:14,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:14,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:00:14,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:00:14,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 02:00:14,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 02:00:14,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:14,601 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 26 treesize of output 28 [2023-11-29 02:00:14,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:14,615 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 26 treesize of output 28 [2023-11-29 02:00:14,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:14,685 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 33 treesize of output 38 [2023-11-29 02:00:14,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:14,699 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 33 treesize of output 38 [2023-11-29 02:00:14,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:14,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 02:00:14,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:14,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 02:00:14,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:14,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 02:00:14,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:14,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 02:00:15,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:15,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 02:00:15,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:15,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 02:00:15,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:15,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 02:00:15,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:15,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 02:00:15,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:15,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-29 02:00:15,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:15,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-29 02:00:20,662 INFO L349 Elim1Store]: treesize reduction 360, result has 35.6 percent of original size [2023-11-29 02:00:20,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 140 treesize of output 262 [2023-11-29 02:00:21,379 INFO L349 Elim1Store]: treesize reduction 396, result has 33.4 percent of original size [2023-11-29 02:00:21,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 140 treesize of output 264 [2023-11-29 02:00:40,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:40,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 489 treesize of output 241 [2023-11-29 02:00:40,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:00:40,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 876 treesize of output 448 [2023-11-29 02:00:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 106 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:00:40,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:00:46,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:46,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374837865] [2023-11-29 02:00:46,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:46,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688794029] [2023-11-29 02:00:46,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688794029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:00:46,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:00:46,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2023-11-29 02:00:46,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038236490] [2023-11-29 02:00:46,924 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:00:46,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:00:46,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:46,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:00:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3140, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 02:00:46,925 INFO L87 Difference]: Start difference. First operand 1000 states and 1391 transitions. Second operand has 39 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 34 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:01:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:00,490 INFO L93 Difference]: Finished difference Result 1049 states and 1449 transitions. [2023-11-29 02:01:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 02:01:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 34 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 59 [2023-11-29 02:01:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:00,495 INFO L225 Difference]: With dead ends: 1049 [2023-11-29 02:01:00,495 INFO L226 Difference]: Without dead ends: 1045 [2023-11-29 02:01:00,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=572, Invalid=6234, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 02:01:00,497 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 125 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:00,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 376 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 02:01:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2023-11-29 02:01:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1019. [2023-11-29 02:01:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 674 states have (on average 1.1350148367952522) internal successors, (765), 675 states have internal predecessors, (765), 325 states have call successors, (325), 19 states have call predecessors, (325), 19 states have return successors, (325), 324 states have call predecessors, (325), 325 states have call successors, (325) [2023-11-29 02:01:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1415 transitions. [2023-11-29 02:01:00,886 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1415 transitions. Word has length 59 [2023-11-29 02:01:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:00,887 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1415 transitions. [2023-11-29 02:01:00,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 34 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:01:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1415 transitions. [2023-11-29 02:01:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:01:00,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:00,888 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:00,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 02:01:01,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:01:01,089 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:01:01,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1874446332, now seen corresponding path program 26 times [2023-11-29 02:01:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:01,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968600130] [2023-11-29 02:01:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:01,104 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:01,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192836494] [2023-11-29 02:01:01,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:01:01,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:01,105 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 02:01:01,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:01:01,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:01:01,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:01:01,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 71 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:01:01,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:01:01,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:01,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968600130] [2023-11-29 02:01:01,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:01,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192836494] [2023-11-29 02:01:01,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192836494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:01,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:01:01,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2023-11-29 02:01:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965345439] [2023-11-29 02:01:01,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:01,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 02:01:01,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 02:01:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:01:01,740 INFO L87 Difference]: Start difference. First operand 1019 states and 1415 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:01:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:06,581 INFO L93 Difference]: Finished difference Result 2967 states and 4053 transitions. [2023-11-29 02:01:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 02:01:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2023-11-29 02:01:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:06,594 INFO L225 Difference]: With dead ends: 2967 [2023-11-29 02:01:06,594 INFO L226 Difference]: Without dead ends: 2101 [2023-11-29 02:01:06,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1662, Invalid=6710, Unknown=0, NotChecked=0, Total=8372 [2023-11-29 02:01:06,600 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1835 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 1321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 2746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1321 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:06,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1875 Valid, 953 Invalid, 2746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1321 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 02:01:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2023-11-29 02:01:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1221. [2023-11-29 02:01:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 803 states have (on average 1.1357409713574098) internal successors, (912), 804 states have internal predecessors, (912), 397 states have call successors, (397), 20 states have call predecessors, (397), 20 states have return successors, (397), 396 states have call predecessors, (397), 397 states have call successors, (397) [2023-11-29 02:01:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1706 transitions. [2023-11-29 02:01:07,271 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1706 transitions. Word has length 60 [2023-11-29 02:01:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:07,271 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 1706 transitions. [2023-11-29 02:01:07,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:01:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1706 transitions. [2023-11-29 02:01:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 02:01:07,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:07,273 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:07,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 02:01:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:07,473 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:01:07,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1337069027, now seen corresponding path program 27 times [2023-11-29 02:01:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624000677] [2023-11-29 02:01:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:07,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:07,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767906648] [2023-11-29 02:01:07,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:01:07,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:07,495 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:07,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 02:01:07,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 02:01:07,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:01:07,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:01:07,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 61 proven. 55 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:01:08,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:01:08,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:08,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624000677] [2023-11-29 02:01:08,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:08,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767906648] [2023-11-29 02:01:08,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767906648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:01:08,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:01:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2023-11-29 02:01:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481723391] [2023-11-29 02:01:08,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:08,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 02:01:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 02:01:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:01:08,346 INFO L87 Difference]: Start difference. First operand 1221 states and 1706 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:01:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:01:11,269 INFO L93 Difference]: Finished difference Result 1374 states and 1851 transitions. [2023-11-29 02:01:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:01:11,269 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2023-11-29 02:01:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:01:11,275 INFO L225 Difference]: With dead ends: 1374 [2023-11-29 02:01:11,275 INFO L226 Difference]: Without dead ends: 1370 [2023-11-29 02:01:11,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:01:11,276 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 370 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:01:11,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1061 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 02:01:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2023-11-29 02:01:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1222. [2023-11-29 02:01:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 804 states have (on average 1.1355721393034826) internal successors, (913), 805 states have internal predecessors, (913), 397 states have call successors, (397), 20 states have call predecessors, (397), 20 states have return successors, (397), 396 states have call predecessors, (397), 397 states have call successors, (397) [2023-11-29 02:01:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1707 transitions. [2023-11-29 02:01:11,814 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1707 transitions. Word has length 60 [2023-11-29 02:01:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:01:11,814 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 1707 transitions. [2023-11-29 02:01:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 33 states have internal predecessors, (52), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:01:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1707 transitions. [2023-11-29 02:01:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 02:01:11,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:01:11,815 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:01:11,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 02:01:12,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:12,016 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:01:12,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:01:12,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1532615162, now seen corresponding path program 28 times [2023-11-29 02:01:12,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:01:12,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453350890] [2023-11-29 02:01:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:01:12,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:01:12,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:01:12,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104319303] [2023-11-29 02:01:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:01:12,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:01:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:01:12,032 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:01:12,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 02:01:12,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:01:12,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:01:12,967 WARN L260 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 150 conjunts are in the unsatisfiable core [2023-11-29 02:01:12,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:01:13,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:13,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:01:13,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 02:01:13,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 02:01:13,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,092 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 26 treesize of output 28 [2023-11-29 02:01:13,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,108 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 26 treesize of output 28 [2023-11-29 02:01:13,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,167 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 33 treesize of output 38 [2023-11-29 02:01:13,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,190 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 33 treesize of output 38 [2023-11-29 02:01:13,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 02:01:13,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 02:01:13,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 02:01:13,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 02:01:13,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 02:01:13,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 02:01:13,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 02:01:13,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 02:01:13,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-29 02:01:13,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:13,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-29 02:01:14,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:14,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-11-29 02:01:14,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:14,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-11-29 02:01:19,559 INFO L349 Elim1Store]: treesize reduction 400, result has 35.6 percent of original size [2023-11-29 02:01:19,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 45 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 210 case distinctions, treesize of input 154 treesize of output 290 [2023-11-29 02:01:20,344 INFO L349 Elim1Store]: treesize reduction 440, result has 33.4 percent of original size [2023-11-29 02:01:20,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 45 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 210 case distinctions, treesize of input 154 treesize of output 292 [2023-11-29 02:01:48,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:48,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 579 treesize of output 283 [2023-11-29 02:01:48,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:01:48,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 825 treesize of output 489 [2023-11-29 02:01:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 110 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:01:48,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:01:55,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:01:55,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453350890] [2023-11-29 02:01:55,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:01:55,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104319303] [2023-11-29 02:01:55,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104319303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:01:55,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:01:55,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-11-29 02:01:55,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749672345] [2023-11-29 02:01:55,175 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:01:55,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:01:55,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:01:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:01:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2503, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 02:01:55,177 INFO L87 Difference]: Start difference. First operand 1222 states and 1707 transitions. Second operand has 35 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:02:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:02:02,375 INFO L93 Difference]: Finished difference Result 1272 states and 1766 transitions. [2023-11-29 02:02:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 02:02:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 61 [2023-11-29 02:02:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:02:02,385 INFO L225 Difference]: With dead ends: 1272 [2023-11-29 02:02:02,385 INFO L226 Difference]: Without dead ends: 1268 [2023-11-29 02:02:02,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=409, Invalid=2897, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 02:02:02,387 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 57 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:02:02,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 449 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-29 02:02:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2023-11-29 02:02:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1241. [2023-11-29 02:02:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 818 states have (on average 1.1356968215158925) internal successors, (929), 819 states have internal predecessors, (929), 401 states have call successors, (401), 21 states have call predecessors, (401), 21 states have return successors, (401), 400 states have call predecessors, (401), 401 states have call successors, (401) [2023-11-29 02:02:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1731 transitions. [2023-11-29 02:02:02,898 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1731 transitions. Word has length 61 [2023-11-29 02:02:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:02:02,899 INFO L495 AbstractCegarLoop]: Abstraction has 1241 states and 1731 transitions. [2023-11-29 02:02:02,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:02:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1731 transitions. [2023-11-29 02:02:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 02:02:02,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:02:02,900 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:02,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 02:02:03,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:03,101 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:02:03,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash 298511805, now seen corresponding path program 29 times [2023-11-29 02:02:03,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:03,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445387882] [2023-11-29 02:02:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:03,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:02:03,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722538153] [2023-11-29 02:02:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:02:03,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:03,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:03,120 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:03,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 02:02:04,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 02:02:04,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:02:04,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:02:04,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 82 proven. 55 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:02:04,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:02:04,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:04,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445387882] [2023-11-29 02:02:04,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:02:04,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722538153] [2023-11-29 02:02:04,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722538153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:02:04,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:02:04,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2023-11-29 02:02:04,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422021490] [2023-11-29 02:02:04,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:04,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:02:04,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:04,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:02:04,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:02:04,600 INFO L87 Difference]: Start difference. First operand 1241 states and 1731 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:02:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:02:09,865 INFO L93 Difference]: Finished difference Result 3681 states and 5035 transitions. [2023-11-29 02:02:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-29 02:02:09,865 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 62 [2023-11-29 02:02:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:02:09,878 INFO L225 Difference]: With dead ends: 3681 [2023-11-29 02:02:09,878 INFO L226 Difference]: Without dead ends: 2609 [2023-11-29 02:02:09,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2142, Invalid=9200, Unknown=0, NotChecked=0, Total=11342 [2023-11-29 02:02:09,884 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 2381 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 1830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2425 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1830 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:02:09,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2425 Valid, 918 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1830 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 02:02:09,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2023-11-29 02:02:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1465. [2023-11-29 02:02:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 961 states have (on average 1.1363163371488034) internal successors, (1092), 962 states have internal predecessors, (1092), 481 states have call successors, (481), 22 states have call predecessors, (481), 22 states have return successors, (481), 480 states have call predecessors, (481), 481 states have call successors, (481) [2023-11-29 02:02:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2054 transitions. [2023-11-29 02:02:10,526 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2054 transitions. Word has length 62 [2023-11-29 02:02:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:02:10,526 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2054 transitions. [2023-11-29 02:02:10,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:02:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2054 transitions. [2023-11-29 02:02:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 02:02:10,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:02:10,528 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:10,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 02:02:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 02:02:10,728 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:02:10,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash -474216516, now seen corresponding path program 30 times [2023-11-29 02:02:10,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:10,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845068857] [2023-11-29 02:02:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:10,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:02:10,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823400193] [2023-11-29 02:02:10,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:02:10,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:10,747 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:10,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 02:02:11,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 02:02:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:02:11,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:02:11,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 71 proven. 66 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:02:11,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:02:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:02:12,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:02:12,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845068857] [2023-11-29 02:02:12,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:02:12,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823400193] [2023-11-29 02:02:12,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823400193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:02:12,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:02:12,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2023-11-29 02:02:12,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667431804] [2023-11-29 02:02:12,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:02:12,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:02:12,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:02:12,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:02:12,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:02:12,020 INFO L87 Difference]: Start difference. First operand 1465 states and 2054 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:02:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:02:15,420 INFO L93 Difference]: Finished difference Result 1650 states and 2230 transitions. [2023-11-29 02:02:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:02:15,421 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 62 [2023-11-29 02:02:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:02:15,428 INFO L225 Difference]: With dead ends: 1650 [2023-11-29 02:02:15,428 INFO L226 Difference]: Without dead ends: 1646 [2023-11-29 02:02:15,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 02:02:15,429 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 368 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:02:15,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 1686 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 02:02:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2023-11-29 02:02:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1466. [2023-11-29 02:02:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 962 states have (on average 1.136174636174636) internal successors, (1093), 963 states have internal predecessors, (1093), 481 states have call successors, (481), 22 states have call predecessors, (481), 22 states have return successors, (481), 480 states have call predecessors, (481), 481 states have call successors, (481) [2023-11-29 02:02:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2055 transitions. [2023-11-29 02:02:16,031 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2055 transitions. Word has length 62 [2023-11-29 02:02:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:02:16,031 INFO L495 AbstractCegarLoop]: Abstraction has 1466 states and 2055 transitions. [2023-11-29 02:02:16,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:02:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2055 transitions. [2023-11-29 02:02:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 02:02:16,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:02:16,033 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:02:16,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 02:02:16,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 02:02:16,233 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:02:16,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:02:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1783728069, now seen corresponding path program 31 times [2023-11-29 02:02:16,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:02:16,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534160736] [2023-11-29 02:02:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:02:16,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:02:16,252 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:02:16,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339497979] [2023-11-29 02:02:16,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:02:16,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:02:16,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:02:16,253 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:02:16,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 02:02:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:02:17,087 WARN L260 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 164 conjunts are in the unsatisfiable core [2023-11-29 02:02:17,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:02:17,140 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 11 treesize of output 7 [2023-11-29 02:02:17,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:02:17,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 02:02:17,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 02:02:17,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,255 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 26 treesize of output 28 [2023-11-29 02:02:17,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,272 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 26 treesize of output 28 [2023-11-29 02:02:17,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,340 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 33 treesize of output 38 [2023-11-29 02:02:17,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,362 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 33 treesize of output 38 [2023-11-29 02:02:17,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 02:02:17,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 02:02:17,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 02:02:17,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 02:02:17,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 02:02:17,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 02:02:17,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 02:02:17,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:17,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 02:02:18,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:18,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-29 02:02:18,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:18,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-29 02:02:18,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:18,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-11-29 02:02:18,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:18,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-11-29 02:02:18,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:18,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2023-11-29 02:02:18,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:02:18,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2023-11-29 02:02:25,865 INFO L349 Elim1Store]: treesize reduction 484, result has 33.4 percent of original size [2023-11-29 02:02:25,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 22 select indices, 22 select index equivalence classes, 55 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 253 case distinctions, treesize of input 168 treesize of output 320 [2023-11-29 02:02:26,572 INFO L349 Elim1Store]: treesize reduction 440, result has 35.6 percent of original size [2023-11-29 02:02:26,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 22 select indices, 22 select index equivalence classes, 55 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 253 case distinctions, treesize of input 168 treesize of output 318 [2023-11-29 02:03:01,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:01,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 676 treesize of output 328 [2023-11-29 02:03:01,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:01,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 1294 treesize of output 638 [2023-11-29 02:03:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 16 proven. 148 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:03:02,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:11,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:11,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534160736] [2023-11-29 02:03:11,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:03:11,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339497979] [2023-11-29 02:03:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339497979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:03:11,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:03:11,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2023-11-29 02:03:11,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418921242] [2023-11-29 02:03:11,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:11,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 02:03:11,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:11,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 02:03:11,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=3850, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 02:03:11,528 INFO L87 Difference]: Start difference. First operand 1466 states and 2055 transitions. Second operand has 43 states, 40 states have (on average 1.175) internal successors, (47), 38 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:03:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:32,215 INFO L93 Difference]: Finished difference Result 1519 states and 2117 transitions. [2023-11-29 02:03:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 02:03:32,215 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.175) internal successors, (47), 38 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 63 [2023-11-29 02:03:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:32,224 INFO L225 Difference]: With dead ends: 1519 [2023-11-29 02:03:32,224 INFO L226 Difference]: Without dead ends: 1515 [2023-11-29 02:03:32,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=618, Invalid=7572, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 02:03:32,227 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 124 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:32,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 471 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-29 02:03:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2023-11-29 02:03:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1485. [2023-11-29 02:03:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 976 states have (on average 1.1362704918032787) internal successors, (1109), 977 states have internal predecessors, (1109), 485 states have call successors, (485), 23 states have call predecessors, (485), 23 states have return successors, (485), 484 states have call predecessors, (485), 485 states have call successors, (485) [2023-11-29 02:03:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2079 transitions. [2023-11-29 02:03:32,841 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2079 transitions. Word has length 63 [2023-11-29 02:03:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:32,841 INFO L495 AbstractCegarLoop]: Abstraction has 1485 states and 2079 transitions. [2023-11-29 02:03:32,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.175) internal successors, (47), 38 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:03:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2079 transitions. [2023-11-29 02:03:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 02:03:32,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:32,842 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:32,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 02:03:33,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 02:03:33,043 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:33,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash 571086748, now seen corresponding path program 32 times [2023-11-29 02:03:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:33,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286879257] [2023-11-29 02:03:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:33,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:03:33,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116393704] [2023-11-29 02:03:33,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:03:33,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:33,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:33,062 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:33,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 02:03:33,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:03:33,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:03:33,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 02:03:33,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 94 proven. 66 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:03:33,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:03:33,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:33,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286879257] [2023-11-29 02:03:33,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:03:33,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116393704] [2023-11-29 02:03:33,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116393704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:33,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:03:33,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2023-11-29 02:03:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790858926] [2023-11-29 02:03:33,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:33,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:03:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:03:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 02:03:33,883 INFO L87 Difference]: Start difference. First operand 1485 states and 2079 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:03:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:41,122 INFO L93 Difference]: Finished difference Result 4477 states and 6129 transitions. [2023-11-29 02:03:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 02:03:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2023-11-29 02:03:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:41,136 INFO L225 Difference]: With dead ends: 4477 [2023-11-29 02:03:41,136 INFO L226 Difference]: Without dead ends: 3177 [2023-11-29 02:03:41,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 76 SyntacticMatches, 13 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4615 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2703, Invalid=12303, Unknown=0, NotChecked=0, Total=15006 [2023-11-29 02:03:41,143 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 3367 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 2504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3415 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 4169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2504 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:41,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3415 Valid, 1142 Invalid, 4169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2504 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 02:03:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2023-11-29 02:03:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 1731. [2023-11-29 02:03:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1133 states have (on average 1.1368049426301854) internal successors, (1288), 1134 states have internal predecessors, (1288), 573 states have call successors, (573), 24 states have call predecessors, (573), 24 states have return successors, (573), 572 states have call predecessors, (573), 573 states have call successors, (573) [2023-11-29 02:03:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2434 transitions. [2023-11-29 02:03:41,915 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2434 transitions. Word has length 64 [2023-11-29 02:03:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:41,915 INFO L495 AbstractCegarLoop]: Abstraction has 1731 states and 2434 transitions. [2023-11-29 02:03:41,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:03:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2434 transitions. [2023-11-29 02:03:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-29 02:03:41,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:41,917 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:41,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 02:03:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:42,117 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:42,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1908654723, now seen corresponding path program 33 times [2023-11-29 02:03:42,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:42,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487088541] [2023-11-29 02:03:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:42,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:03:42,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289387050] [2023-11-29 02:03:42,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:03:42,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:42,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:42,137 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:42,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 02:03:42,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 02:03:42,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:03:42,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 02:03:42,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 82 proven. 78 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:03:43,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:03:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:03:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:03:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487088541] [2023-11-29 02:03:43,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:03:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289387050] [2023-11-29 02:03:43,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289387050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:03:43,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:03:43,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2023-11-29 02:03:43,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177000907] [2023-11-29 02:03:43,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:03:43,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 02:03:43,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:03:43,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 02:03:43,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 02:03:43,461 INFO L87 Difference]: Start difference. First operand 1731 states and 2434 transitions. Second operand has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:03:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:03:46,906 INFO L93 Difference]: Finished difference Result 1951 states and 2644 transitions. [2023-11-29 02:03:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:03:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2023-11-29 02:03:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:03:46,912 INFO L225 Difference]: With dead ends: 1951 [2023-11-29 02:03:46,912 INFO L226 Difference]: Without dead ends: 1947 [2023-11-29 02:03:46,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 76 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=649, Invalid=2003, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 02:03:46,913 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 485 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:03:46,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 1698 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 02:03:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2023-11-29 02:03:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1732. [2023-11-29 02:03:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1134 states have (on average 1.13668430335097) internal successors, (1289), 1135 states have internal predecessors, (1289), 573 states have call successors, (573), 24 states have call predecessors, (573), 24 states have return successors, (573), 572 states have call predecessors, (573), 573 states have call successors, (573) [2023-11-29 02:03:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2435 transitions. [2023-11-29 02:03:47,648 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2435 transitions. Word has length 64 [2023-11-29 02:03:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:03:47,648 INFO L495 AbstractCegarLoop]: Abstraction has 1732 states and 2435 transitions. [2023-11-29 02:03:47,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:03:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2435 transitions. [2023-11-29 02:03:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:03:47,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:03:47,650 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:03:47,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 02:03:47,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 02:03:47,851 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:03:47,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:03:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash 993327770, now seen corresponding path program 34 times [2023-11-29 02:03:47,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:03:47,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054704280] [2023-11-29 02:03:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:03:47,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:03:47,877 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:03:47,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80935782] [2023-11-29 02:03:47,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:03:47,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:03:47,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:03:47,878 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:03:47,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 02:03:49,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:03:49,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:03:49,432 WARN L260 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 172 conjunts are in the unsatisfiable core [2023-11-29 02:03:49,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:03:49,465 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 11 [2023-11-29 02:03:49,472 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 11 [2023-11-29 02:03:49,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-11-29 02:03:49,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-11-29 02:03:49,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:49,570 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 38 treesize of output 40 [2023-11-29 02:03:49,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:49,587 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 38 treesize of output 40 [2023-11-29 02:03:49,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:49,650 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 49 treesize of output 54 [2023-11-29 02:03:49,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:49,671 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 49 treesize of output 54 [2023-11-29 02:03:49,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:49,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 68 [2023-11-29 02:03:49,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:49,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 68 [2023-11-29 02:03:49,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:49,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 82 [2023-11-29 02:03:49,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:49,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 82 [2023-11-29 02:03:50,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:50,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 96 [2023-11-29 02:03:50,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:50,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 96 [2023-11-29 02:03:50,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:50,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 110 [2023-11-29 02:03:50,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:50,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 110 [2023-11-29 02:03:50,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:50,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 104 treesize of output 124 [2023-11-29 02:03:50,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:50,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 104 treesize of output 124 [2023-11-29 02:03:50,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:50,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 115 treesize of output 138 [2023-11-29 02:03:50,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:50,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 115 treesize of output 138 [2023-11-29 02:03:51,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:51,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 126 treesize of output 152 [2023-11-29 02:03:51,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:51,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 126 treesize of output 152 [2023-11-29 02:03:51,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:51,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 135 treesize of output 164 [2023-11-29 02:03:51,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:03:51,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 135 treesize of output 164 [2023-11-29 02:04:03,924 INFO L349 Elim1Store]: treesize reduction 1176, result has 32.5 percent of original size [2023-11-29 02:04:03,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 36 select indices, 36 select index equivalence classes, 66 disjoint index pairs (out of 630 index pairs), introduced 36 new quantified variables, introduced 666 case distinctions, treesize of input 410 treesize of output 682 [2023-11-29 02:04:05,887 INFO L349 Elim1Store]: treesize reduction 1248, result has 31.2 percent of original size [2023-11-29 02:04:05,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 36 select indices, 36 select index equivalence classes, 66 disjoint index pairs (out of 630 index pairs), introduced 36 new quantified variables, introduced 666 case distinctions, treesize of input 410 treesize of output 684 [2023-11-29 02:05:39,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:05:39,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 780 treesize of output 376 [2023-11-29 02:05:39,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:05:39,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 1113 treesize of output 661 [2023-11-29 02:05:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 156 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 02:05:40,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:54,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:54,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054704280] [2023-11-29 02:05:54,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:05:54,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80935782] [2023-11-29 02:05:54,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80935782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:54,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:05:54,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2023-11-29 02:05:54,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125402962] [2023-11-29 02:05:54,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 02:05:54,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:54,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 02:05:54,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=4053, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 02:05:54,095 INFO L87 Difference]: Start difference. First operand 1732 states and 2435 transitions. Second operand has 43 states, 40 states have (on average 1.225) internal successors, (49), 39 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:06:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:10,200 INFO L93 Difference]: Finished difference Result 1793 states and 2505 transitions. [2023-11-29 02:06:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 02:06:10,201 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.225) internal successors, (49), 39 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 65 [2023-11-29 02:06:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:10,205 INFO L225 Difference]: With dead ends: 1793 [2023-11-29 02:06:10,206 INFO L226 Difference]: Without dead ends: 1772 [2023-11-29 02:06:10,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=590, Invalid=4666, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 02:06:10,207 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 60 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 2356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:10,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 548 Invalid, 2356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2023-11-29 02:06:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2023-11-29 02:06:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1753. [2023-11-29 02:06:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1149 states have (on average 1.1357702349869452) internal successors, (1305), 1150 states have internal predecessors, (1305), 577 states have call successors, (577), 26 states have call predecessors, (577), 26 states have return successors, (577), 576 states have call predecessors, (577), 577 states have call successors, (577) [2023-11-29 02:06:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2459 transitions. [2023-11-29 02:06:10,972 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2459 transitions. Word has length 65 [2023-11-29 02:06:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:10,972 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2459 transitions. [2023-11-29 02:06:10,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.225) internal successors, (49), 39 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 02:06:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2459 transitions. [2023-11-29 02:06:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 02:06:10,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:10,974 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:10,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 02:06:11,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 02:06:11,174 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:11,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:11,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1197897564, now seen corresponding path program 35 times [2023-11-29 02:06:11,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:11,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742532704] [2023-11-29 02:06:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:11,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:11,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:06:11,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943175726] [2023-11-29 02:06:11,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:06:11,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:11,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:11,194 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:11,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 02:06:17,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-29 02:06:17,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:17,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:06:17,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 94 proven. 91 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 02:06:18,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-29 02:06:18,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:18,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742532704] [2023-11-29 02:06:18,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:06:18,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943175726] [2023-11-29 02:06:18,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943175726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:18,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:06:18,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2023-11-29 02:06:18,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685382557] [2023-11-29 02:06:18,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:18,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 02:06:18,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:18,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 02:06:18,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 02:06:18,484 INFO L87 Difference]: Start difference. First operand 1753 states and 2459 transitions. Second operand has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:06:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:22,291 INFO L93 Difference]: Finished difference Result 2321 states and 3144 transitions. [2023-11-29 02:06:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:06:22,292 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 66 [2023-11-29 02:06:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:22,298 INFO L225 Difference]: With dead ends: 2321 [2023-11-29 02:06:22,298 INFO L226 Difference]: Without dead ends: 2167 [2023-11-29 02:06:22,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 76 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=748, Invalid=2332, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 02:06:22,300 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 381 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 2525 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:22,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 1975 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2525 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 02:06:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2023-11-29 02:06:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1902. [2023-11-29 02:06:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1245 states have (on average 1.1365461847389557) internal successors, (1415), 1246 states have internal predecessors, (1415), 629 states have call successors, (629), 27 states have call predecessors, (629), 27 states have return successors, (629), 628 states have call predecessors, (629), 629 states have call successors, (629) [2023-11-29 02:06:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2673 transitions. [2023-11-29 02:06:23,138 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2673 transitions. Word has length 66 [2023-11-29 02:06:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:23,138 INFO L495 AbstractCegarLoop]: Abstraction has 1902 states and 2673 transitions. [2023-11-29 02:06:23,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-29 02:06:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2673 transitions. [2023-11-29 02:06:23,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 02:06:23,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:23,140 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:23,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 02:06:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 02:06:23,340 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:23,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1487799141, now seen corresponding path program 36 times [2023-11-29 02:06:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:23,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547780318] [2023-11-29 02:06:23,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:23,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:23,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:06:23,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016574280] [2023-11-29 02:06:23,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:06:23,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:23,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:23,360 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:23,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37f9e5e6-4fb3-4eb6-9574-0004bab3a758/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 02:06:24,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-29 02:06:24,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:24,693 WARN L260 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 187 conjunts are in the unsatisfiable core [2023-11-29 02:06:24,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:24,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:06:24,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 02:06:24,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 02:06:24,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-29 02:06:24,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:24,817 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 26 treesize of output 28 [2023-11-29 02:06:24,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:24,832 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 26 treesize of output 28 [2023-11-29 02:06:24,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:24,894 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 33 treesize of output 38 [2023-11-29 02:06:24,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:24,912 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 33 treesize of output 38 [2023-11-29 02:06:24,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:24,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 02:06:25,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-11-29 02:06:25,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 02:06:25,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-29 02:06:25,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 02:06:25,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-29 02:06:25,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 02:06:25,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-29 02:06:25,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-29 02:06:25,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-29 02:06:25,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-11-29 02:06:25,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:25,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-11-29 02:06:26,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:26,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2023-11-29 02:06:26,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:26,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2023-11-29 02:06:26,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:26,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 89 treesize of output 118 [2023-11-29 02:06:26,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:26,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 89 treesize of output 118 [2023-11-29 02:06:26,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:26,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 96 treesize of output 128 [2023-11-29 02:06:26,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:26,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 96 treesize of output 128 [2023-11-29 02:06:34,000 INFO L349 Elim1Store]: treesize reduction 520, result has 35.6 percent of original size [2023-11-29 02:06:34,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 26 select indices, 26 select index equivalence classes, 78 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 351 case distinctions, treesize of input 196 treesize of output 374 [2023-11-29 02:06:35,241 INFO L349 Elim1Store]: treesize reduction 572, result has 33.4 percent of original size [2023-11-29 02:06:35,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 26 select indices, 26 select index equivalence classes, 78 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 351 case distinctions, treesize of input 196 treesize of output 376 [2023-11-29 02:07:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:42,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:07:43,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 98 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 957 treesize of output 913 [2023-11-29 02:07:43,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 02:07:44,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:07:44,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 98 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 1978 treesize of output 1446