./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/poly2.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_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/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_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/poly2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/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_d3009d04-f056-4b2e-aedb-aa4736c38030/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 d98e92b0e397ee2afc9955ae7b4baaedb8be19fb7d6475412e7373cae81d62ab --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:18:10,208 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:18:10,290 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:18:10,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:18:10,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:18:10,317 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:18:10,317 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:18:10,318 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:18:10,319 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:18:10,319 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:18:10,320 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:18:10,320 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:18:10,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:18:10,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:18:10,322 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:18:10,323 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:18:10,323 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:18:10,324 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:18:10,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:18:10,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:18:10,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:18:10,326 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:18:10,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:18:10,327 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:18:10,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:18:10,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:18:10,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:18:10,329 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:18:10,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:18:10,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:18:10,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:18:10,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:18:10,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:18:10,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:18:10,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:18:10,331 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:18:10,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:18:10,332 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:18:10,332 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:18:10,332 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:18:10,332 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:18:10,332 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:18:10,333 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_d3009d04-f056-4b2e-aedb-aa4736c38030/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d98e92b0e397ee2afc9955ae7b4baaedb8be19fb7d6475412e7373cae81d62ab [2023-11-29 01:18:10,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:18:10,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:18:10,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:18:10,612 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:18:10,613 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:18:10,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-tiling/poly2.c [2023-11-29 01:18:13,319 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:18:13,489 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:18:13,490 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/sv-benchmarks/c/array-tiling/poly2.c [2023-11-29 01:18:13,498 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/data/4b9e57b4c/5776732796d84e34874faf04267de032/FLAGea0362466 [2023-11-29 01:18:13,512 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/data/4b9e57b4c/5776732796d84e34874faf04267de032 [2023-11-29 01:18:13,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:18:13,517 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:18:13,518 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:18:13,518 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:18:13,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:18:13,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cd10d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13, skipping insertion in model container [2023-11-29 01:18:13,526 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,547 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:18:13,683 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_d3009d04-f056-4b2e-aedb-aa4736c38030/sv-benchmarks/c/array-tiling/poly2.c[396,409] [2023-11-29 01:18:13,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:18:13,708 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:18:13,719 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_d3009d04-f056-4b2e-aedb-aa4736c38030/sv-benchmarks/c/array-tiling/poly2.c[396,409] [2023-11-29 01:18:13,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:18:13,737 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:18:13,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13 WrapperNode [2023-11-29 01:18:13,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:18:13,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:18:13,739 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:18:13,739 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:18:13,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,765 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-11-29 01:18:13,765 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:18:13,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:18:13,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:18:13,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:18:13,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,791 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 8, 4]. 57 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-11-29 01:18:13,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,802 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,805 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:18:13,806 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:18:13,806 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:18:13,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:18:13,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (1/1) ... [2023-11-29 01:18:13,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:18:13,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:13,838 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:18:13,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:18:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:18:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:18:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:18:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:18:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:18:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:18:13,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:18:13,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:18:13,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:18:13,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:18:13,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:18:13,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:18:13,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:18:13,943 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:18:13,946 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:18:14,099 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:18:14,135 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:18:14,135 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 01:18:14,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:18:14 BoogieIcfgContainer [2023-11-29 01:18:14,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:18:14,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:18:14,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:18:14,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:18:14,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:18:13" (1/3) ... [2023-11-29 01:18:14,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f155e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:18:14, skipping insertion in model container [2023-11-29 01:18:14,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:18:13" (2/3) ... [2023-11-29 01:18:14,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f155e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:18:14, skipping insertion in model container [2023-11-29 01:18:14,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:18:14" (3/3) ... [2023-11-29 01:18:14,146 INFO L112 eAbstractionObserver]: Analyzing ICFG poly2.c [2023-11-29 01:18:14,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:18:14,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:18:14,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:18:14,224 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;@3b187d26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:18:14,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:18:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 01:18:14,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:14,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:14,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:14,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:14,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1857965342, now seen corresponding path program 1 times [2023-11-29 01:18:14,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:14,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227249607] [2023-11-29 01:18:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:14,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:14,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227249607] [2023-11-29 01:18:14,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 01:18:14,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128838711] [2023-11-29 01:18:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:14,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:14,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:14,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:18:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:14,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 01:18:14,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:14,479 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 01:18:14,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:18:14,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128838711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:18:14,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:18:14,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:18:14,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503021447] [2023-11-29 01:18:14,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:18:14,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:18:14,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:14,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:18:14,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:18:14,527 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:14,557 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2023-11-29 01:18:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:18:14,560 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 01:18:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:14,567 INFO L225 Difference]: With dead ends: 25 [2023-11-29 01:18:14,567 INFO L226 Difference]: Without dead ends: 11 [2023-11-29 01:18:14,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 01:18:14,574 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:14,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:18:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-29 01:18:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-29 01:18:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-29 01:18:14,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2023-11-29 01:18:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:14,604 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-29 01:18:14,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:14,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-29 01:18:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 01:18:14,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:14,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:14,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:18:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 01:18:14,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:14,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 827910552, now seen corresponding path program 1 times [2023-11-29 01:18:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:14,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497402157] [2023-11-29 01:18:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:14,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497402157] [2023-11-29 01:18:14,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 01:18:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629601258] [2023-11-29 01:18:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:14,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:14,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:14,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:14,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:18:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:14,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:18:14,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:14,938 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 01:18:14,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:18:14,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629601258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:18:14,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:18:14,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:18:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190032495] [2023-11-29 01:18:14,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:18:14,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:18:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:14,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:18:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:18:14,942 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:14,964 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-29 01:18:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:18:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 01:18:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:14,965 INFO L225 Difference]: With dead ends: 20 [2023-11-29 01:18:14,965 INFO L226 Difference]: Without dead ends: 12 [2023-11-29 01:18:14,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:18:14,967 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:14,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:18:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-29 01:18:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-29 01:18:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-29 01:18:14,972 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-11-29 01:18:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:14,973 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-29 01:18:14,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:14,973 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-29 01:18:14,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 01:18:14,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:14,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:14,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:18:15,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:15,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:15,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -790291495, now seen corresponding path program 1 times [2023-11-29 01:18:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:15,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033383952] [2023-11-29 01:18:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:15,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:15,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:15,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767981023] [2023-11-29 01:18:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:15,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:15,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:15,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:15,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:18:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:15,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:18:15,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:15,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:15,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:15,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033383952] [2023-11-29 01:18:15,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:15,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767981023] [2023-11-29 01:18:15,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767981023] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:15,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:18:15,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-29 01:18:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289283696] [2023-11-29 01:18:15,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:15,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:18:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:18:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:18:15,316 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:15,343 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2023-11-29 01:18:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:18:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 01:18:15,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:15,344 INFO L225 Difference]: With dead ends: 21 [2023-11-29 01:18:15,344 INFO L226 Difference]: Without dead ends: 13 [2023-11-29 01:18:15,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:18:15,346 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:15,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:18:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-29 01:18:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-29 01:18:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-29 01:18:15,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-11-29 01:18:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:15,350 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-29 01:18:15,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-29 01:18:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 01:18:15,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:15,351 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:15,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:18:15,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:15,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:15,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:15,553 INFO L85 PathProgramCache]: Analyzing trace with hash 585052600, now seen corresponding path program 2 times [2023-11-29 01:18:15,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:15,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663662888] [2023-11-29 01:18:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:15,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:15,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:15,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106466573] [2023-11-29 01:18:15,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:18:15,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:15,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:15,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:15,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:18:15,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:18:15,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:18:15,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:18:15,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:18:15,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:18:15,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:15,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663662888] [2023-11-29 01:18:15,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:15,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106466573] [2023-11-29 01:18:15,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106466573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:18:15,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:18:15,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:18:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646129998] [2023-11-29 01:18:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:18:15,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:18:15,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:18:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:18:15,662 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:15,688 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-11-29 01:18:15,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:18:15,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 01:18:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:15,689 INFO L225 Difference]: With dead ends: 25 [2023-11-29 01:18:15,689 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 01:18:15,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:18:15,691 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:15,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 9 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:18:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 01:18:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2023-11-29 01:18:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-29 01:18:15,695 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2023-11-29 01:18:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:15,695 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-29 01:18:15,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-29 01:18:15,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 01:18:15,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:15,696 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:15,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:18:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:15,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:15,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2057523480, now seen corresponding path program 1 times [2023-11-29 01:18:15,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:15,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993200190] [2023-11-29 01:18:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:15,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:15,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:15,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43700881] [2023-11-29 01:18:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:15,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:15,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:15,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:18:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:15,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:18:15,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:18:16,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:18:16,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993200190] [2023-11-29 01:18:16,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43700881] [2023-11-29 01:18:16,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43700881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:16,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:18:16,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 01:18:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786694300] [2023-11-29 01:18:16,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:18:16,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:16,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:18:16,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:18:16,046 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:16,097 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-11-29 01:18:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:18:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 01:18:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:16,098 INFO L225 Difference]: With dead ends: 31 [2023-11-29 01:18:16,098 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 01:18:16,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:18:16,099 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:16,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:18:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 01:18:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2023-11-29 01:18:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-29 01:18:16,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2023-11-29 01:18:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:16,104 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-29 01:18:16,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-29 01:18:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 01:18:16,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:16,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:16,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:18:16,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:16,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:16,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:16,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1921963960, now seen corresponding path program 2 times [2023-11-29 01:18:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701300282] [2023-11-29 01:18:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:16,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:16,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576010321] [2023-11-29 01:18:16,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:18:16,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:16,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:16,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:16,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:18:16,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:18:16,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:18:16,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:18:16,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:16,458 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 01:18:16,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:18:16,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:18:16,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:18:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:16,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:17,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2023-11-29 01:18:17,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:18:17,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:18:17,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:18:17,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 244 [2023-11-29 01:18:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:17,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:17,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701300282] [2023-11-29 01:18:17,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:17,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576010321] [2023-11-29 01:18:17,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576010321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:17,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:18:17,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2023-11-29 01:18:17,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620831218] [2023-11-29 01:18:17,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:17,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:18:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:17,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:18:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:18:17,466 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:18,162 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2023-11-29 01:18:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:18:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-29 01:18:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:18,163 INFO L225 Difference]: With dead ends: 57 [2023-11-29 01:18:18,163 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 01:18:18,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:18:18,166 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:18,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 63 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:18:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 01:18:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 26. [2023-11-29 01:18:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-29 01:18:18,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 13 [2023-11-29 01:18:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:18,179 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-29 01:18:18,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-29 01:18:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 01:18:18,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:18,180 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:18,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:18:18,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:18,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:18,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash 695472088, now seen corresponding path program 3 times [2023-11-29 01:18:18,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257974450] [2023-11-29 01:18:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:18,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:18,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270467166] [2023-11-29 01:18:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:18:18,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:18,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:18,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:18,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:18:18,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:18:18,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:18:18,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:18:18,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:18:18,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:18:18,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:18,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257974450] [2023-11-29 01:18:18,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:18,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270467166] [2023-11-29 01:18:18,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270467166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:18,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:18:18,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-29 01:18:18,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530418042] [2023-11-29 01:18:18,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:18,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:18:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:18:18,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:18:18,643 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:18,869 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-11-29 01:18:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:18:18,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 01:18:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:18,871 INFO L225 Difference]: With dead ends: 65 [2023-11-29 01:18:18,871 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 01:18:18,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:18:18,872 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:18,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 67 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:18:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 01:18:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 31. [2023-11-29 01:18:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-29 01:18:18,888 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 15 [2023-11-29 01:18:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:18,888 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-29 01:18:18,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-29 01:18:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 01:18:18,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:18,889 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:18,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:18:19,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:19,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:19,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1365480648, now seen corresponding path program 4 times [2023-11-29 01:18:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:19,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219260631] [2023-11-29 01:18:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:19,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:19,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:19,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3896136] [2023-11-29 01:18:19,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:18:19,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:19,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:19,110 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:19,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:18:19,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:18:19,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:18:19,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:18:19,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:19,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:19,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:19,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219260631] [2023-11-29 01:18:19,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:19,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3896136] [2023-11-29 01:18:19,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3896136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:19,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:18:19,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-29 01:18:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692235623] [2023-11-29 01:18:19,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:18:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:18:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:18:19,365 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:19,640 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-11-29 01:18:19,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:18:19,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-29 01:18:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:19,642 INFO L225 Difference]: With dead ends: 74 [2023-11-29 01:18:19,642 INFO L226 Difference]: Without dead ends: 68 [2023-11-29 01:18:19,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:18:19,643 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 63 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:19,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 107 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:18:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-29 01:18:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 32. [2023-11-29 01:18:19,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-11-29 01:18:19,656 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2023-11-29 01:18:19,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:19,656 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-11-29 01:18:19,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-11-29 01:18:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 01:18:19,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:19,657 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:19,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:18:19,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:19,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:19,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1426612968, now seen corresponding path program 5 times [2023-11-29 01:18:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:19,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195931798] [2023-11-29 01:18:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:19,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:19,871 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:19,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176589973] [2023-11-29 01:18:19,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:18:19,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:19,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:19,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:18:20,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 01:18:20,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:18:20,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:18:20,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:18:20,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:18:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195931798] [2023-11-29 01:18:20,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176589973] [2023-11-29 01:18:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176589973] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:20,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:18:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-29 01:18:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364992625] [2023-11-29 01:18:20,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:20,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:18:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:20,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:18:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:18:20,435 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:20,550 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-11-29 01:18:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:18:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-29 01:18:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:20,554 INFO L225 Difference]: With dead ends: 69 [2023-11-29 01:18:20,554 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 01:18:20,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 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 01:18:20,555 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:20,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 35 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:18:20,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 01:18:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2023-11-29 01:18:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-29 01:18:20,569 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 16 [2023-11-29 01:18:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:20,570 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-29 01:18:20,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-29 01:18:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 01:18:20,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:20,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:20,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:18:20,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 01:18:20,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:20,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1024533829, now seen corresponding path program 1 times [2023-11-29 01:18:20,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:20,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568921999] [2023-11-29 01:18:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:20,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:20,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:20,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842973188] [2023-11-29 01:18:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:20,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:20,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:20,788 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:20,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:18:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:20,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 01:18:20,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:20,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:18:20,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 01:18:20,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-11-29 01:18:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:21,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:21,488 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 52 treesize of output 48 [2023-11-29 01:18:21,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:18:21,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:18:21,547 INFO L349 Elim1Store]: treesize reduction 23, result has 39.5 percent of original size [2023-11-29 01:18:21,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 47 [2023-11-29 01:18:21,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:18:21,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 01:18:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:21,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:21,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568921999] [2023-11-29 01:18:21,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:18:21,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842973188] [2023-11-29 01:18:21,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842973188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:21,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:18:21,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2023-11-29 01:18:21,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336547301] [2023-11-29 01:18:21,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:21,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:18:21,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:18:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:18:21,587 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:22,048 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-11-29 01:18:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:18:22,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-29 01:18:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:22,049 INFO L225 Difference]: With dead ends: 50 [2023-11-29 01:18:22,049 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 01:18:22,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:18:22,050 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:22,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 80 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:18:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 01:18:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2023-11-29 01:18:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-29 01:18:22,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2023-11-29 01:18:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:22,060 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-29 01:18:22,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-29 01:18:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 01:18:22,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:22,061 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:22,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:18:22,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:18:22,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:22,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 660909528, now seen corresponding path program 6 times [2023-11-29 01:18:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:22,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996318165] [2023-11-29 01:18:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:22,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:18:22,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809847066] [2023-11-29 01:18:22,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:18:22,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:22,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:22,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:18:22,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 01:18:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:18:22,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 01:18:22,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:22,462 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 01:18:22,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:18:22,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:18:22,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:18:22,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:18:22,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:18:22,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:18:22,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:18:22,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 22 [2023-11-29 01:18:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:18:22,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:20:32,334 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 52 treesize of output 48 [2023-11-29 01:20:32,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:20:32,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:20:32,814 INFO L349 Elim1Store]: treesize reduction 20, result has 54.5 percent of original size [2023-11-29 01:20:32,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1174 treesize of output 1133 [2023-11-29 01:20:33,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:20:33,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1630 treesize of output 1595 [2023-11-29 01:20:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:20:33,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:20:33,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996318165] [2023-11-29 01:20:33,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:20:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809847066] [2023-11-29 01:20:33,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809847066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:20:33,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:20:33,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-29 01:20:33,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736304877] [2023-11-29 01:20:33,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:20:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:20:33,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:20:33,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:20:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=493, Unknown=23, NotChecked=0, Total=600 [2023-11-29 01:20:33,385 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:49,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:20:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:20:53,057 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2023-11-29 01:20:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 01:20:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 01:20:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:20:53,059 INFO L225 Difference]: With dead ends: 102 [2023-11-29 01:20:53,059 INFO L226 Difference]: Without dead ends: 100 [2023-11-29 01:20:53,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 142.5s TimeCoverageRelationStatistics Valid=613, Invalid=3920, Unknown=23, NotChecked=0, Total=4556 [2023-11-29 01:20:53,062 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 184 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:20:53,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 140 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-29 01:20:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-29 01:20:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 41. [2023-11-29 01:20:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2023-11-29 01:20:53,089 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 17 [2023-11-29 01:20:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:20:53,089 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2023-11-29 01:20:53,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2023-11-29 01:20:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 01:20:53,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:20:53,091 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:20:53,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:20:53,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:20:53,291 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:20:53,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:20:53,292 INFO L85 PathProgramCache]: Analyzing trace with hash -688076970, now seen corresponding path program 2 times [2023-11-29 01:20:53,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:20:53,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235411816] [2023-11-29 01:20:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:20:53,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:20:53,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:20:53,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820352579] [2023-11-29 01:20:53,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:20:53,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:20:53,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:20:53,301 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:20:53,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:20:53,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:20:53,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:20:53,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 01:20:53,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:20:53,440 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 01:20:53,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 01:20:53,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 01:20:53,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:20:53,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 01:20:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:20:53,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:20:54,840 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 52 treesize of output 48 [2023-11-29 01:20:54,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:20:54,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:20:54,962 INFO L349 Elim1Store]: treesize reduction 22, result has 54.2 percent of original size [2023-11-29 01:20:54,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 175 treesize of output 144 [2023-11-29 01:20:55,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:20:55,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 105 [2023-11-29 01:20:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:20:55,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:20:55,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235411816] [2023-11-29 01:20:55,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:20:55,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820352579] [2023-11-29 01:20:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820352579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:20:55,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:20:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-11-29 01:20:55,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183602389] [2023-11-29 01:20:55,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:20:55,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:20:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:20:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:20:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:20:55,227 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:20:58,322 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2023-11-29 01:20:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 01:20:58,323 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 01:20:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:20:58,323 INFO L225 Difference]: With dead ends: 96 [2023-11-29 01:20:58,323 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 01:20:58,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 01:20:58,325 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:20:58,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 150 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:20:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 01:20:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 53. [2023-11-29 01:20:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2023-11-29 01:20:58,363 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 18 [2023-11-29 01:20:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:20:58,364 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2023-11-29 01:20:58,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2023-11-29 01:20:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 01:20:58,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:20:58,365 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:20:58,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:20:58,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:20:58,565 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:20:58,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:20:58,566 INFO L85 PathProgramCache]: Analyzing trace with hash 731084312, now seen corresponding path program 7 times [2023-11-29 01:20:58,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:20:58,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732802214] [2023-11-29 01:20:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:20:58,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:20:58,576 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:20:58,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157616934] [2023-11-29 01:20:58,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:20:58,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:20:58,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:20:58,578 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:20:58,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:20:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:20:58,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:20:58,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:20:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:20:58,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:20:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:20:58,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:20:58,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732802214] [2023-11-29 01:20:58,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:20:58,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157616934] [2023-11-29 01:20:58,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157616934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:20:58,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:20:58,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2023-11-29 01:20:58,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678222263] [2023-11-29 01:20:58,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:20:58,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:20:58,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:20:58,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:20:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:20:58,873 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:20:59,591 INFO L93 Difference]: Finished difference Result 163 states and 183 transitions. [2023-11-29 01:20:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:20:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 01:20:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:20:59,593 INFO L225 Difference]: With dead ends: 163 [2023-11-29 01:20:59,593 INFO L226 Difference]: Without dead ends: 154 [2023-11-29 01:20:59,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=587, Invalid=1765, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:20:59,594 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 156 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:20:59,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 375 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:20:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-29 01:20:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 57. [2023-11-29 01:20:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2023-11-29 01:20:59,636 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 21 [2023-11-29 01:20:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:20:59,636 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2023-11-29 01:20:59,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:20:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2023-11-29 01:20:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 01:20:59,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:20:59,637 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:20:59,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:20:59,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:20:59,838 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:20:59,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:20:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1461035527, now seen corresponding path program 8 times [2023-11-29 01:20:59,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:20:59,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771645030] [2023-11-29 01:20:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:20:59,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:20:59,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:20:59,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296379332] [2023-11-29 01:20:59,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:20:59,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:20:59,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:20:59,852 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:20:59,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:20:59,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:20:59,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:20:59,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:20:59,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:21:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:21:00,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:21:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:21:00,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:21:00,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771645030] [2023-11-29 01:21:00,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:21:00,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296379332] [2023-11-29 01:21:00,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296379332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:21:00,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:21:00,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-29 01:21:00,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696326541] [2023-11-29 01:21:00,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:21:00,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:21:00,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:21:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:21:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:21:00,071 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:21:00,257 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2023-11-29 01:21:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:21:00,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 01:21:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:21:00,258 INFO L225 Difference]: With dead ends: 111 [2023-11-29 01:21:00,258 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 01:21:00,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:21:00,259 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:21:00,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 53 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:21:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 01:21:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2023-11-29 01:21:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2023-11-29 01:21:00,298 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 21 [2023-11-29 01:21:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:21:00,298 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2023-11-29 01:21:00,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2023-11-29 01:21:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 01:21:00,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:21:00,299 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:21:00,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:21:00,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:00,499 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:21:00,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:21:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1383114983, now seen corresponding path program 3 times [2023-11-29 01:21:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:21:00,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455758982] [2023-11-29 01:21:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:21:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:21:00,508 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:21:00,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777337902] [2023-11-29 01:21:00,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:21:00,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:00,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:21:00,509 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:21:00,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:21:00,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:21:00,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:21:00,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 01:21:00,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:21:00,941 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 01:21:01,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 01:21:01,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 01:21:01,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2023-11-29 01:21:01,079 INFO L349 Elim1Store]: treesize reduction 39, result has 2.5 percent of original size [2023-11-29 01:21:01,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 152 [2023-11-29 01:21:01,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 19 [2023-11-29 01:21:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:21:01,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:21:02,504 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 52 treesize of output 48 [2023-11-29 01:21:02,517 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:21:02,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:21:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 01:21:02,652 INFO L349 Elim1Store]: treesize reduction 22, result has 54.2 percent of original size [2023-11-29 01:21:02,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 100 [2023-11-29 01:21:02,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:21:02,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 72 [2023-11-29 01:21:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:21:03,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:21:03,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455758982] [2023-11-29 01:21:03,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:21:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777337902] [2023-11-29 01:21:03,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777337902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:21:03,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:21:03,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2023-11-29 01:21:03,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954641292] [2023-11-29 01:21:03,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:21:03,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 01:21:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:21:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 01:21:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:21:03,107 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:21:05,719 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2023-11-29 01:21:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 01:21:05,719 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 01:21:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:21:05,720 INFO L225 Difference]: With dead ends: 85 [2023-11-29 01:21:05,720 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 01:21:05,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=678, Invalid=3104, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 01:21:05,722 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 96 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:21:05,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 84 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:21:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 01:21:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2023-11-29 01:21:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-11-29 01:21:05,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 21 [2023-11-29 01:21:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:21:05,751 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-11-29 01:21:05,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-11-29 01:21:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 01:21:05,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:21:05,751 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:21:05,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:21:05,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:21:05,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:21:05,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:21:05,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1614152950, now seen corresponding path program 4 times [2023-11-29 01:21:05,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:21:05,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814362905] [2023-11-29 01:21:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:21:05,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:21:05,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:21:05,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060579876] [2023-11-29 01:21:05,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:21:05,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:05,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:21:05,965 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:21:05,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:21:06,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:21:06,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:21:06,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 01:21:06,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:21:06,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:21:06,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:21:06,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:21:06,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:21:06,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 01:21:06,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-11-29 01:21:06,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:21:06,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:21:06,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:21:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:21:06,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:21:12,775 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 52 treesize of output 48 [2023-11-29 01:21:12,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:21:12,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:21:13,273 INFO L349 Elim1Store]: treesize reduction 22, result has 54.2 percent of original size [2023-11-29 01:21:13,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1798 treesize of output 1731 [2023-11-29 01:21:14,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:21:14,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2027 treesize of output 1950 [2023-11-29 01:21:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:21:14,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:21:14,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814362905] [2023-11-29 01:21:14,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:21:14,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060579876] [2023-11-29 01:21:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060579876] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:21:14,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:21:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2023-11-29 01:21:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209199171] [2023-11-29 01:21:14,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:21:14,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 01:21:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:21:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 01:21:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:21:14,394 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:21:34,438 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2023-11-29 01:21:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 01:21:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 01:21:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:21:34,439 INFO L225 Difference]: With dead ends: 145 [2023-11-29 01:21:34,439 INFO L226 Difference]: Without dead ends: 143 [2023-11-29 01:21:34,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=566, Invalid=3466, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 01:21:34,441 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 168 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:21:34,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 217 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 01:21:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-29 01:21:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 65. [2023-11-29 01:21:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2023-11-29 01:21:34,495 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 22 [2023-11-29 01:21:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:21:34,495 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2023-11-29 01:21:34,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2023-11-29 01:21:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 01:21:34,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:21:34,495 INFO L195 NwaCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:21:34,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:21:34,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:21:34,696 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:21:34,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:21:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash 724269768, now seen corresponding path program 9 times [2023-11-29 01:21:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:21:34,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739370610] [2023-11-29 01:21:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:21:34,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:21:34,707 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:21:34,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494529357] [2023-11-29 01:21:34,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:21:34,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:21:34,708 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:21:34,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:21:35,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 01:21:35,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:21:35,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:21:35,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:21:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:21:35,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:21:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:21:35,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:21:35,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739370610] [2023-11-29 01:21:35,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:21:35,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494529357] [2023-11-29 01:21:35,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494529357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:21:35,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:21:35,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-11-29 01:21:35,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030608816] [2023-11-29 01:21:35,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:21:35,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 01:21:35,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:21:35,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 01:21:35,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:21:35,812 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:21:37,009 INFO L93 Difference]: Finished difference Result 286 states and 311 transitions. [2023-11-29 01:21:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 01:21:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-29 01:21:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:21:37,011 INFO L225 Difference]: With dead ends: 286 [2023-11-29 01:21:37,011 INFO L226 Difference]: Without dead ends: 254 [2023-11-29 01:21:37,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1000, Invalid=3422, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 01:21:37,014 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 810 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:21:37,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 129 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:21:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-29 01:21:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 123. [2023-11-29 01:21:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 122 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2023-11-29 01:21:37,159 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 22 [2023-11-29 01:21:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:21:37,159 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2023-11-29 01:21:37,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2023-11-29 01:21:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 01:21:37,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:21:37,160 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:21:37,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:21:37,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:21:37,360 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:21:37,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:21:37,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2114679112, now seen corresponding path program 5 times [2023-11-29 01:21:37,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:21:37,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630629658] [2023-11-29 01:21:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:21:37,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:21:37,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:21:37,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986945111] [2023-11-29 01:21:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:21:37,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:21:37,370 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:21:37,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:24:23,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 01:24:23,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:24:23,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 01:24:23,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:24:23,959 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 13 treesize of output 9 [2023-11-29 01:24:23,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:24:23,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 01:24:24,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:24:24,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-11-29 01:24:24,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:24:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:24:24,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:24:27,141 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 52 treesize of output 48 [2023-11-29 01:24:27,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:24:27,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:24:27,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:24:27,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 244 [2023-11-29 01:24:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:24:27,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:24:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630629658] [2023-11-29 01:24:27,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:24:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986945111] [2023-11-29 01:24:27,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986945111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:24:27,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:24:27,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2023-11-29 01:24:27,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512282691] [2023-11-29 01:24:27,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:24:27,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 01:24:27,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:24:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 01:24:27,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:24:27,353 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:24:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:24:31,731 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2023-11-29 01:24:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 01:24:31,731 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 01:24:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:24:31,732 INFO L225 Difference]: With dead ends: 177 [2023-11-29 01:24:31,732 INFO L226 Difference]: Without dead ends: 175 [2023-11-29 01:24:31,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:24:31,733 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:24:31,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 197 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 01:24:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-29 01:24:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2023-11-29 01:24:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 134 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:24:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2023-11-29 01:24:31,904 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 23 [2023-11-29 01:24:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:24:31,904 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2023-11-29 01:24:31,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:24:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2023-11-29 01:24:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 01:24:31,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:24:31,905 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:24:31,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:24:32,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:24:32,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:24:32,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:24:32,105 INFO L85 PathProgramCache]: Analyzing trace with hash -416804328, now seen corresponding path program 10 times [2023-11-29 01:24:32,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:24:32,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024652039] [2023-11-29 01:24:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:24:32,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:24:32,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:24:32,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012749136] [2023-11-29 01:24:32,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:24:32,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:24:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:24:32,117 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:24:32,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:24:33,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:24:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:24:33,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-29 01:24:33,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:24:33,272 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 01:24:33,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-29 01:24:33,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:24:33,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 22 [2023-11-29 01:24:33,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:24:33,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 22 [2023-11-29 01:24:33,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 01:24:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:24:33,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:25:00,413 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse51 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse56 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse55 (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse52 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296)) (.cse54 (mod (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse53 (mod (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse0 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse45 (* .cse53 8)) (.cse46 (* .cse54 8)) (.cse47 (* .cse52 8)) (.cse48 (* .cse55 8)) (.cse49 (* 8 .cse56)) (.cse50 (* .cse51 8))) (let ((.cse13 (< 2147483647 .cse52)) (.cse30 (< .cse56 2147483648)) (.cse33 (< 2147483647 .cse56)) (.cse28 (< 2147483647 .cse55)) (.cse29 (< .cse55 2147483648)) (.cse24 (< 2147483647 .cse54)) (.cse22 (< .cse54 2147483648)) (.cse14 (< 2147483647 .cse53)) (.cse3 (+ .cse50 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse4 (+ .cse49 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse48)) (.cse6 (+ .cse47 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse7 (+ .cse46 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse8 (+ .cse45 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse26 (< .cse53 2147483648)) (.cse34 (< .cse52 2147483648)) (.cse11 (< .cse51 2147483648)) (.cse12 (< 2147483647 .cse51)) (.cse16 (+ .cse50 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse17 (+ .cse49 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse48)) (.cse19 (+ .cse47 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse20 (+ .cse46 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse21 (+ .cse45 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse35 (* .cse0 8))) (and (or (< 2147483647 .cse0) (let ((.cse10 (+ .cse35 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (select .cse9 .cse10))) (and (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_100 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse2 (store .cse9 .cse10 v_ArrVal_673))) (or (< .cse1 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse2 .cse3 v_ArrVal_675) .cse4 v_DerPreprocessor_100) .cse5 v_DerPreprocessor_99) .cse6 v_DerPreprocessor_88) .cse7 v_DerPreprocessor_86) .cse8 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse2 .cse3) (+ v_ArrVal_675 2))))) .cse11) (or .cse12 (and (or .cse13 (and (or .cse14 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_108 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse15 (store .cse9 .cse10 v_ArrVal_673))) (or (< .cse1 (+ v_ArrVal_673 2)) (< (select .cse15 .cse16) (+ v_ArrVal_675 2)) (= (select (store (store (store (store (store (store .cse15 .cse16 v_ArrVal_675) .cse17 v_DerPreprocessor_108) .cse18 v_DerPreprocessor_93) .cse19 v_DerPreprocessor_89) .cse20 v_DerPreprocessor_85) .cse21 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) (or (and (or .cse22 (forall ((v_ArrVal_675 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_90 Int) (v_prenex_220 Int) (v_DerPreprocessor_110 Int) (v_DerPreprocessor_86 Int)) (let ((.cse23 (store .cse9 .cse10 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse23 .cse16 v_ArrVal_675) .cse17 v_DerPreprocessor_110) .cse18 v_DerPreprocessor_90) .cse19 v_DerPreprocessor_89) .cse7 v_DerPreprocessor_86) .cse8 v_prenex_220) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse1 (+ v_ArrVal_673 2)) (< (select .cse23 .cse16) (+ v_ArrVal_675 2)))))) (or .cse24 (forall ((v_ArrVal_675 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_111 Int) (v_DerPreprocessor_83 Int) (v_DerPreprocessor_91 Int) (v_DerPreprocessor_87 Int)) (let ((.cse25 (store .cse9 .cse10 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse25 .cse16 v_ArrVal_675) .cse17 v_DerPreprocessor_111) .cse18 v_DerPreprocessor_91) .cse19 v_DerPreprocessor_89) .cse20 v_DerPreprocessor_87) .cse8 v_DerPreprocessor_83) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse1 (+ v_ArrVal_673 2)) (< (select .cse25 .cse16) (+ v_ArrVal_675 2))))))) .cse26))) (or (and (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_102 Int) (v_DerPreprocessor_86 Int) (v_DerPreprocessor_98 Int) (v_prenex_218 Int)) (let ((.cse27 (store .cse9 .cse10 v_ArrVal_673))) (or (< .cse1 (+ v_ArrVal_673 2)) (< (select .cse27 .cse16) (+ v_ArrVal_675 2)) (= (select (store (store (store (store (store (store .cse27 .cse16 v_ArrVal_675) .cse17 v_DerPreprocessor_102) .cse18 v_DerPreprocessor_98) .cse6 v_DerPreprocessor_88) .cse7 v_DerPreprocessor_86) .cse8 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse28) (or .cse29 (and (or .cse30 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_100 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse31 (store .cse9 .cse10 v_ArrVal_673))) (or (< .cse1 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse31 .cse16 v_ArrVal_675) .cse4 v_DerPreprocessor_100) .cse5 v_DerPreprocessor_99) .cse6 v_DerPreprocessor_88) .cse7 v_DerPreprocessor_86) .cse8 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse31 .cse16) (+ v_ArrVal_675 2)))))) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_101 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse32 (store .cse9 .cse10 v_ArrVal_673))) (or (< .cse1 (+ v_ArrVal_673 2)) (< (select .cse32 .cse16) (+ v_ArrVal_675 2)) (= (select (store (store (store (store (store (store .cse32 .cse16 v_ArrVal_675) .cse17 v_DerPreprocessor_101) .cse5 v_DerPreprocessor_99) .cse6 v_DerPreprocessor_88) .cse7 v_DerPreprocessor_86) .cse8 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse33)))) .cse34))))))) (or (let ((.cse38 (+ .cse35 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (let ((.cse37 (select .cse9 .cse38))) (and (or (and (or .cse13 (and (or (and (or .cse30 (forall ((v_DerPreprocessor_107 Int) (v_ArrVal_675 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse36 (store .cse9 .cse38 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse36 .cse3 v_ArrVal_675) .cse4 v_DerPreprocessor_107) .cse18 v_DerPreprocessor_93) .cse19 v_DerPreprocessor_89) .cse20 v_DerPreprocessor_85) .cse21 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse36 .cse3) (+ v_ArrVal_675 2)) (< .cse37 (+ v_ArrVal_673 2)))))) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_108 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse39 (store .cse9 .cse38 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse39 .cse3 v_ArrVal_675) .cse17 v_DerPreprocessor_108) .cse18 v_DerPreprocessor_93) .cse19 v_DerPreprocessor_89) .cse20 v_DerPreprocessor_85) .cse21 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse39 .cse3) (+ v_ArrVal_675 2)) (< .cse37 (+ v_ArrVal_673 2))))) .cse33)) .cse28) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_109 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_92 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse40 (store .cse9 .cse38 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse40 .cse3 v_ArrVal_675) .cse4 v_DerPreprocessor_109) .cse5 v_DerPreprocessor_92) .cse19 v_DerPreprocessor_89) .cse20 v_DerPreprocessor_85) .cse21 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse40 .cse3) (+ v_ArrVal_675 2)) (< .cse37 (+ v_ArrVal_673 2))))) .cse29))) (or (and (or (and (or .cse24 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_97 Int) (v_DerPreprocessor_104 Int) (v_prenex_217 Int) (v_DerPreprocessor_85 Int)) (let ((.cse41 (store .cse9 .cse38 v_ArrVal_673))) (or (< (select .cse41 .cse3) (+ v_ArrVal_675 2)) (< .cse37 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse41 .cse3 v_ArrVal_675) .cse4 v_DerPreprocessor_104) .cse5 v_DerPreprocessor_97) .cse6 v_DerPreprocessor_88) .cse20 v_DerPreprocessor_85) .cse21 v_prenex_217) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) (or .cse22 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_82 Int) (v_DerPreprocessor_95 Int) (v_DerPreprocessor_84 Int) (v_DerPreprocessor_106 Int)) (let ((.cse42 (store .cse9 .cse38 v_ArrVal_673))) (or (< (select .cse42 .cse3) (+ v_ArrVal_675 2)) (< .cse37 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse42 .cse3 v_ArrVal_675) .cse4 v_DerPreprocessor_106) .cse5 v_DerPreprocessor_95) .cse6 v_DerPreprocessor_88) .cse7 v_DerPreprocessor_84) .cse21 v_DerPreprocessor_82) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))))) .cse14) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_100 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse43 (store .cse9 .cse38 v_ArrVal_673))) (or (< (select .cse43 .cse3) (+ v_ArrVal_675 2)) (< .cse37 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse43 .cse3 v_ArrVal_675) .cse4 v_DerPreprocessor_100) .cse5 v_DerPreprocessor_99) .cse6 v_DerPreprocessor_88) .cse7 v_DerPreprocessor_86) .cse8 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse26)) .cse34)) .cse11) (or .cse12 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_108 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse44 (store .cse9 .cse38 v_ArrVal_673))) (or (< (select .cse44 .cse16) (+ v_ArrVal_675 2)) (= (select (store (store (store (store (store (store .cse44 .cse16 v_ArrVal_675) .cse17 v_DerPreprocessor_108) .cse18 v_DerPreprocessor_93) .cse19 v_DerPreprocessor_89) .cse20 v_DerPreprocessor_85) .cse21 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse37 (+ v_ArrVal_673 2))))))))) (< .cse0 2147483648)))))) is different from false [2023-11-29 01:25:10,128 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse66 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse63 (mod (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse65 (mod (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse64 (mod (+ 7 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse62 (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse61 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296)) (.cse54 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse0 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse55 (* 8 .cse54)) (.cse59 (* .cse61 8)) (.cse60 (* .cse62 8)) (.cse56 (* .cse64 8)) (.cse57 (* .cse65 8)) (.cse58 (* .cse63 8)) (.cse53 (* .cse66 8))) (let ((.cse1 (< 2147483647 .cse66)) (.cse12 (+ .cse53 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse38 (< .cse66 2147483648)) (.cse2 (< .cse54 2147483648)) (.cse27 (< .cse63 2147483648)) (.cse23 (< 2147483647 .cse65)) (.cse26 (< .cse65 2147483648)) (.cse21 (< 2147483647 .cse64)) (.cse7 (+ .cse58 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse8 (+ .cse57 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse9 (+ .cse56 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse22 (< .cse64 2147483648)) (.cse13 (< 2147483647 .cse63)) (.cse34 (< 2147483647 .cse61)) (.cse29 (< 2147483647 .cse62)) (.cse30 (< .cse62 2147483648)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse60)) (.cse6 (+ .cse59 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse4 (+ .cse55 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse32 (< .cse61 2147483648)) (.cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse60)) (.cse17 (+ .cse59 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (+ .cse58 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse19 (+ .cse57 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse20 (+ .cse56 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse15 (+ .cse55 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse35 (< 2147483647 .cse54)) (.cse36 (+ .cse53 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse39 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse41 (* .cse0 8))) (and (or (< 2147483647 .cse0) (let ((.cse11 (let ((.cse40 (+ .cse41 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse39 .cse40 (+ (select .cse39 .cse40) (- 2)))))) (and (or .cse1 (let ((.cse10 (select .cse11 .cse12))) (and (or .cse2 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_100 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse3 (store .cse11 .cse12 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse3 .cse4 v_ArrVal_675) .cse5 v_DerPreprocessor_100) .cse6 v_DerPreprocessor_99) .cse7 v_DerPreprocessor_88) .cse8 v_DerPreprocessor_86) .cse9 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse10 (+ v_ArrVal_673 2)) (< (select .cse3 .cse4) (+ v_ArrVal_675 2)))))) (or (and (or .cse13 (and (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_108 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse14 (store .cse11 .cse12 v_ArrVal_673))) (or (< (select .cse14 .cse15) (+ v_ArrVal_675 2)) (< .cse10 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse14 .cse15 v_ArrVal_675) .cse16 v_DerPreprocessor_108) .cse17 v_DerPreprocessor_93) .cse18 v_DerPreprocessor_89) .cse19 v_DerPreprocessor_85) .cse20 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse21) (or .cse22 (and (or .cse23 (forall ((v_ArrVal_675 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_111 Int) (v_DerPreprocessor_83 Int) (v_DerPreprocessor_91 Int) (v_DerPreprocessor_87 Int)) (let ((.cse24 (store .cse11 .cse12 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse24 .cse15 v_ArrVal_675) .cse16 v_DerPreprocessor_111) .cse17 v_DerPreprocessor_91) .cse18 v_DerPreprocessor_89) .cse19 v_DerPreprocessor_87) .cse9 v_DerPreprocessor_83) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse24 .cse15) (+ v_ArrVal_675 2)) (< .cse10 (+ v_ArrVal_673 2)))))) (or (forall ((v_ArrVal_675 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_90 Int) (v_prenex_220 Int) (v_DerPreprocessor_110 Int) (v_DerPreprocessor_86 Int)) (let ((.cse25 (store .cse11 .cse12 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse25 .cse15 v_ArrVal_675) .cse16 v_DerPreprocessor_110) .cse17 v_DerPreprocessor_90) .cse18 v_DerPreprocessor_89) .cse8 v_DerPreprocessor_86) .cse9 v_prenex_220) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse25 .cse15) (+ v_ArrVal_675 2)) (< .cse10 (+ v_ArrVal_673 2))))) .cse26))))) (or .cse27 (and (or (and (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_101 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse28 (store .cse11 .cse12 v_ArrVal_673))) (or (< (select .cse28 .cse15) (+ v_ArrVal_675 2)) (< .cse10 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse28 .cse15 v_ArrVal_675) .cse16 v_DerPreprocessor_101) .cse6 v_DerPreprocessor_99) .cse7 v_DerPreprocessor_88) .cse8 v_DerPreprocessor_86) .cse9 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse29) (or .cse30 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_100 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse31 (store .cse11 .cse12 v_ArrVal_673))) (or (< (select .cse31 .cse15) (+ v_ArrVal_675 2)) (= (select (store (store (store (store (store (store .cse31 .cse15 v_ArrVal_675) .cse5 v_DerPreprocessor_100) .cse6 v_DerPreprocessor_99) .cse7 v_DerPreprocessor_88) .cse8 v_DerPreprocessor_86) .cse9 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse10 (+ v_ArrVal_673 2))))))) .cse32) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_102 Int) (v_DerPreprocessor_86 Int) (v_DerPreprocessor_98 Int) (v_prenex_218 Int)) (let ((.cse33 (store .cse11 .cse12 v_ArrVal_673))) (or (< (select .cse33 .cse15) (+ v_ArrVal_675 2)) (< .cse10 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse33 .cse15 v_ArrVal_675) .cse16 v_DerPreprocessor_102) .cse17 v_DerPreprocessor_98) .cse7 v_DerPreprocessor_88) .cse8 v_DerPreprocessor_86) .cse9 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse34)))) .cse35)))) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_100 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse37 (store .cse11 .cse36 v_ArrVal_673))) (or (< (select .cse11 .cse36) (+ v_ArrVal_673 2)) (< (select .cse37 .cse4) (+ v_ArrVal_675 2)) (= (select (store (store (store (store (store (store .cse37 .cse4 v_ArrVal_675) .cse5 v_DerPreprocessor_100) .cse6 v_DerPreprocessor_99) .cse7 v_DerPreprocessor_88) .cse8 v_DerPreprocessor_86) .cse9 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse38)))) (or (let ((.cse43 (let ((.cse52 (+ .cse41 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse39 .cse52 (+ (- 2) (select .cse39 .cse52)))))) (and (or .cse1 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_108 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse42 (store .cse43 .cse12 v_ArrVal_673))) (or (< (select .cse42 .cse15) (+ v_ArrVal_675 2)) (= (select (store (store (store (store (store (store .cse42 .cse15 v_ArrVal_675) .cse16 v_DerPreprocessor_108) .cse17 v_DerPreprocessor_93) .cse18 v_DerPreprocessor_89) .cse19 v_DerPreprocessor_85) .cse20 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse43 .cse12) (+ v_ArrVal_673 2)))))) (or .cse38 (let ((.cse45 (select .cse43 .cse36))) (and (or .cse2 (and (or .cse27 (and (or (and (or .cse23 (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_97 Int) (v_DerPreprocessor_104 Int) (v_prenex_217 Int) (v_DerPreprocessor_85 Int)) (let ((.cse44 (store .cse43 .cse36 v_ArrVal_673))) (or (< (select .cse44 .cse4) (+ v_ArrVal_675 2)) (< .cse45 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse44 .cse4 v_ArrVal_675) .cse5 v_DerPreprocessor_104) .cse6 v_DerPreprocessor_97) .cse7 v_DerPreprocessor_88) .cse19 v_DerPreprocessor_85) .cse20 v_prenex_217) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_82 Int) (v_DerPreprocessor_95 Int) (v_DerPreprocessor_84 Int) (v_DerPreprocessor_106 Int)) (let ((.cse46 (store .cse43 .cse36 v_ArrVal_673))) (or (< (select .cse46 .cse4) (+ v_ArrVal_675 2)) (< .cse45 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse46 .cse4 v_ArrVal_675) .cse5 v_DerPreprocessor_106) .cse6 v_DerPreprocessor_95) .cse7 v_DerPreprocessor_88) .cse8 v_DerPreprocessor_84) .cse20 v_DerPreprocessor_82) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse26)) .cse21) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_99 Int) (v_DerPreprocessor_88 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_100 Int) (v_DerPreprocessor_86 Int) (v_prenex_218 Int)) (let ((.cse47 (store .cse43 .cse36 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse47 .cse4 v_ArrVal_675) .cse5 v_DerPreprocessor_100) .cse6 v_DerPreprocessor_99) .cse7 v_DerPreprocessor_88) .cse8 v_DerPreprocessor_86) .cse9 v_prenex_218) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse47 .cse4) (+ v_ArrVal_675 2)) (< .cse45 (+ v_ArrVal_673 2))))) .cse22))) (or .cse13 (and (or .cse34 (and (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_108 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse48 (store .cse43 .cse36 v_ArrVal_673))) (or (< (select .cse48 .cse4) (+ v_ArrVal_675 2)) (< .cse45 (+ v_ArrVal_673 2)) (= (select (store (store (store (store (store (store .cse48 .cse4 v_ArrVal_675) .cse16 v_DerPreprocessor_108) .cse17 v_DerPreprocessor_93) .cse18 v_DerPreprocessor_89) .cse19 v_DerPreprocessor_85) .cse20 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse29) (or .cse30 (forall ((v_DerPreprocessor_107 Int) (v_ArrVal_675 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse49 (store .cse43 .cse36 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse49 .cse4 v_ArrVal_675) .cse5 v_DerPreprocessor_107) .cse17 v_DerPreprocessor_93) .cse18 v_DerPreprocessor_89) .cse19 v_DerPreprocessor_85) .cse20 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse49 .cse4) (+ v_ArrVal_675 2)) (< .cse45 (+ v_ArrVal_673 2)))))))) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_109 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_92 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse50 (store .cse43 .cse36 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse50 .cse4 v_ArrVal_675) .cse5 v_DerPreprocessor_109) .cse6 v_DerPreprocessor_92) .cse18 v_DerPreprocessor_89) .cse19 v_DerPreprocessor_85) .cse20 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse50 .cse4) (+ v_ArrVal_675 2)) (< .cse45 (+ v_ArrVal_673 2))))) .cse32))))) (or (forall ((v_ArrVal_675 Int) (v_DerPreprocessor_108 Int) (v_ArrVal_673 Int) (v_DerPreprocessor_89 Int) (v_DerPreprocessor_93 Int) (v_prenex_219 Int) (v_DerPreprocessor_85 Int)) (let ((.cse51 (store .cse43 .cse36 v_ArrVal_673))) (or (= (select (store (store (store (store (store (store .cse51 .cse15 v_ArrVal_675) .cse16 v_DerPreprocessor_108) .cse17 v_DerPreprocessor_93) .cse18 v_DerPreprocessor_89) .cse19 v_DerPreprocessor_85) .cse20 v_prenex_219) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse51 .cse15) (+ v_ArrVal_675 2)) (< .cse45 (+ v_ArrVal_673 2))))) .cse35)))))) (< .cse0 2147483648)))))) is different from false [2023-11-29 01:25:35,815 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 52 treesize of output 48 [2023-11-29 01:25:36,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:25:36,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:25:48,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:25:49,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45018931597 treesize of output 45002137328 [2023-11-29 01:25:58,373 WARN L293 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 96370 DAG size of output: 744 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 01:26:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2023-11-29 01:26:12,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:26:12,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024652039] [2023-11-29 01:26:12,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:26:12,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012749136] [2023-11-29 01:26:12,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012749136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:26:12,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:26:12,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2023-11-29 01:26:12,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812242688] [2023-11-29 01:26:12,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:26:12,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 01:26:12,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:26:12,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 01:26:12,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1103, Unknown=2, NotChecked=142, Total=1482 [2023-11-29 01:26:12,162 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:26:16,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 01:26:20,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:26:27,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:26:30,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 01:26:31,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-11-29 01:26:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:26:43,384 INFO L93 Difference]: Finished difference Result 313 states and 362 transitions. [2023-11-29 01:26:43,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 01:26:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 01:26:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:26:43,387 INFO L225 Difference]: With dead ends: 313 [2023-11-29 01:26:43,387 INFO L226 Difference]: Without dead ends: 311 [2023-11-29 01:26:43,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=445, Invalid=2317, Unknown=2, NotChecked=206, Total=2970 [2023-11-29 01:26:43,389 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 153 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:26:43,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 316 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 685 Invalid, 0 Unknown, 319 Unchecked, 14.9s Time] [2023-11-29 01:26:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-29 01:26:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 164. [2023-11-29 01:26:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2024539877300613) internal successors, (196), 163 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:26:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2023-11-29 01:26:43,591 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 25 [2023-11-29 01:26:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:26:43,592 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2023-11-29 01:26:43,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:26:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2023-11-29 01:26:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 01:26:43,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:26:43,592 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:26:43,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:26:43,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:26:43,793 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:26:43,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:26:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash -559638648, now seen corresponding path program 6 times [2023-11-29 01:26:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:26:43,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320719959] [2023-11-29 01:26:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:26:43,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:26:43,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:26:43,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747376714] [2023-11-29 01:26:43,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:26:43,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:26:43,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:26:43,804 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:26:43,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:26:45,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 01:26:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:26:45,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:26:45,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:26:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:26:45,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:26:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:26:46,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:26:46,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320719959] [2023-11-29 01:26:46,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:26:46,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747376714] [2023-11-29 01:26:46,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747376714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:26:46,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:26:46,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2023-11-29 01:26:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462581825] [2023-11-29 01:26:46,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:26:46,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:26:46,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:26:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:26:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:26:46,203 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:26:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:26:47,494 INFO L93 Difference]: Finished difference Result 243 states and 282 transitions. [2023-11-29 01:26:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 01:26:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 01:26:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:26:47,496 INFO L225 Difference]: With dead ends: 243 [2023-11-29 01:26:47,496 INFO L226 Difference]: Without dead ends: 226 [2023-11-29 01:26:47,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:26:47,497 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 111 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:26:47,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 177 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:26:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-29 01:26:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 158. [2023-11-29 01:26:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.197452229299363) internal successors, (188), 157 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:26:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2023-11-29 01:26:47,693 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 26 [2023-11-29 01:26:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:26:47,693 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2023-11-29 01:26:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:26:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2023-11-29 01:26:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 01:26:47,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:26:47,694 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:26:47,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:26:47,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:26:47,894 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:26:47,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:26:47,895 INFO L85 PathProgramCache]: Analyzing trace with hash 180096581, now seen corresponding path program 7 times [2023-11-29 01:26:47,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:26:47,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551867106] [2023-11-29 01:26:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:26:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:26:47,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:26:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557508540] [2023-11-29 01:26:47,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:26:47,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:26:47,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:26:47,904 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:26:47,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:26:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:26:48,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 01:26:48,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:26:48,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:26:48,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:26:48,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2023-11-29 01:26:48,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:26:48,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2023-11-29 01:26:48,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:26:48,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-11-29 01:26:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:26:48,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:27:50,208 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 52 treesize of output 48 [2023-11-29 01:27:50,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:27:50,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:27:50,664 INFO L349 Elim1Store]: treesize reduction 23, result has 39.5 percent of original size [2023-11-29 01:27:50,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 47 [2023-11-29 01:27:50,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:27:50,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 01:27:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:27:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:27:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551867106] [2023-11-29 01:27:50,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:27:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557508540] [2023-11-29 01:27:50,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557508540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:27:50,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:27:50,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2023-11-29 01:27:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338399190] [2023-11-29 01:27:50,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:27:50,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 01:27:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:27:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 01:27:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=655, Unknown=9, NotChecked=0, Total=756 [2023-11-29 01:27:50,860 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:27:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:27:54,944 INFO L93 Difference]: Finished difference Result 201 states and 235 transitions. [2023-11-29 01:27:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:27:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 01:27:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:27:54,946 INFO L225 Difference]: With dead ends: 201 [2023-11-29 01:27:54,946 INFO L226 Difference]: Without dead ends: 181 [2023-11-29 01:27:54,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 61.3s TimeCoverageRelationStatistics Valid=176, Invalid=1455, Unknown=9, NotChecked=0, Total=1640 [2023-11-29 01:27:54,948 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:27:54,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 185 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 01:27:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-29 01:27:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2023-11-29 01:27:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2112676056338028) internal successors, (172), 142 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:27:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2023-11-29 01:27:55,142 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 26 [2023-11-29 01:27:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:27:55,142 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2023-11-29 01:27:55,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:27:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2023-11-29 01:27:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 01:27:55,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:27:55,142 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:27:55,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:27:55,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:27:55,343 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:27:55,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:27:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -845597480, now seen corresponding path program 8 times [2023-11-29 01:27:55,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:27:55,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423806527] [2023-11-29 01:27:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:27:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:27:55,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:27:55,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3356474] [2023-11-29 01:27:55,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:27:55,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:27:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:27:55,355 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:27:55,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:27:55,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:27:55,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:27:55,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-29 01:27:55,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:27:55,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:27:55,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:27:56,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:27:56,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:27:56,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 01:27:56,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:27:56,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-11-29 01:27:56,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:27:56,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:27:56,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:27:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:27:56,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:28:13,040 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 52 treesize of output 48 [2023-11-29 01:28:13,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:28:13,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:28:13,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:28:13,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2747 treesize of output 2666 [2023-11-29 01:28:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:28:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:28:14,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423806527] [2023-11-29 01:28:14,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:28:14,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3356474] [2023-11-29 01:28:14,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3356474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:28:14,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:28:14,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 35 [2023-11-29 01:28:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502950632] [2023-11-29 01:28:14,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:28:14,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 01:28:14,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:28:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 01:28:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:28:14,314 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:29:09,352 INFO L93 Difference]: Finished difference Result 296 states and 344 transitions. [2023-11-29 01:29:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 01:29:09,352 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 01:29:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:29:09,354 INFO L225 Difference]: With dead ends: 296 [2023-11-29 01:29:09,354 INFO L226 Difference]: Without dead ends: 294 [2023-11-29 01:29:09,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=529, Invalid=3893, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 01:29:09,356 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 231 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:29:09,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 255 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-11-29 01:29:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-11-29 01:29:09,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 179. [2023-11-29 01:29:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.2078651685393258) internal successors, (215), 178 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2023-11-29 01:29:09,639 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 27 [2023-11-29 01:29:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:29:09,639 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2023-11-29 01:29:09,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2023-11-29 01:29:09,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 01:29:09,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:29:09,640 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:29:09,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:29:09,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:29:09,840 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:29:09,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:29:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1960601770, now seen corresponding path program 9 times [2023-11-29 01:29:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:29:09,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146348319] [2023-11-29 01:29:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:29:09,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:29:09,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:29:09,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054081751] [2023-11-29 01:29:09,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:29:09,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:29:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:29:09,850 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:29:09,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:29:11,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 01:29:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:29:11,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 01:29:11,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:29:11,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 01:29:11,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:29:11,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 01:29:11,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:29:11,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 01:29:11,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2023-11-29 01:29:11,632 INFO L349 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-11-29 01:29:11,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 166 [2023-11-29 01:29:11,768 INFO L349 Elim1Store]: treesize reduction 30, result has 50.0 percent of original size [2023-11-29 01:29:11,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 65 [2023-11-29 01:29:11,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2023-11-29 01:29:11,906 INFO L349 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2023-11-29 01:29:11,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 132 [2023-11-29 01:29:12,033 INFO L349 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-11-29 01:29:12,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 56 [2023-11-29 01:29:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:29:12,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:29:26,901 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 52 treesize of output 48 [2023-11-29 01:29:26,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:29:26,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-29 01:29:27,749 INFO L349 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2023-11-29 01:29:27,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 504 treesize of output 466 [2023-11-29 01:29:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:29:29,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:29:29,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146348319] [2023-11-29 01:29:29,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:29:29,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054081751] [2023-11-29 01:29:29,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054081751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:29:29,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:29:29,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2023-11-29 01:29:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25313205] [2023-11-29 01:29:29,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:29:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 01:29:29,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:29:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 01:29:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 01:29:29,208 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:29:40,242 INFO L93 Difference]: Finished difference Result 219 states and 256 transitions. [2023-11-29 01:29:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 01:29:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 01:29:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:29:40,244 INFO L225 Difference]: With dead ends: 219 [2023-11-29 01:29:40,244 INFO L226 Difference]: Without dead ends: 217 [2023-11-29 01:29:40,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=872, Invalid=6100, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 01:29:40,246 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:29:40,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 238 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 01:29:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-29 01:29:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 182. [2023-11-29 01:29:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.2044198895027625) internal successors, (218), 181 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2023-11-29 01:29:40,529 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 28 [2023-11-29 01:29:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:29:40,529 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2023-11-29 01:29:40,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2023-11-29 01:29:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 01:29:40,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:29:40,530 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:29:40,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:29:40,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 01:29:40,730 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:29:40,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:29:40,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1723118844, now seen corresponding path program 10 times [2023-11-29 01:29:40,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:29:40,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577689750] [2023-11-29 01:29:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:29:40,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:29:40,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:29:40,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181547591] [2023-11-29 01:29:40,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:29:40,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:29:40,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:29:40,743 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:29:40,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:29:40,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:29:40,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:29:40,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:29:40,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:29:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:29:41,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:29:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:29:42,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:29:42,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577689750] [2023-11-29 01:29:42,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:29:42,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181547591] [2023-11-29 01:29:42,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181547591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:29:42,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:29:42,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2023-11-29 01:29:42,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946403095] [2023-11-29 01:29:42,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:29:42,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 01:29:42,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:29:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 01:29:42,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:29:42,059 INFO L87 Difference]: Start difference. First operand 182 states and 218 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:29:43,993 INFO L93 Difference]: Finished difference Result 283 states and 322 transitions. [2023-11-29 01:29:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:29:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-29 01:29:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:29:43,995 INFO L225 Difference]: With dead ends: 283 [2023-11-29 01:29:43,995 INFO L226 Difference]: Without dead ends: 245 [2023-11-29 01:29:43,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=563, Invalid=1887, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:29:43,996 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 183 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:29:43,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 291 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:29:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-29 01:29:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2023-11-29 01:29:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1840490797546013) internal successors, (193), 163 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2023-11-29 01:29:44,241 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 29 [2023-11-29 01:29:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:29:44,241 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2023-11-29 01:29:44,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:29:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2023-11-29 01:29:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 01:29:44,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:29:44,241 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:29:44,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:29:44,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:29:44,442 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:29:44,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:29:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1418921930, now seen corresponding path program 11 times [2023-11-29 01:29:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:29:44,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524436064] [2023-11-29 01:29:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:29:44,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:29:44,453 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:29:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419719221] [2023-11-29 01:29:44,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:29:44,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:29:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:29:44,454 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:29:44,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3009d04-f056-4b2e-aedb-aa4736c38030/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process