./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:21:53,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:21:53,521 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:21:53,529 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:21:53,529 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:21:53,560 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:21:53,561 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:21:53,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:21:53,562 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:21:53,563 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:21:53,564 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:21:53,564 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:21:53,565 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:21:53,566 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:21:53,566 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:21:53,567 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:21:53,567 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:21:53,568 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:21:53,569 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:21:53,569 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:21:53,570 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:21:53,571 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:21:53,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:21:53,572 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:21:53,573 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:21:53,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:21:53,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:21:53,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:21:53,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:21:53,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:21:53,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:21:53,576 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:21:53,577 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:21:53,577 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:21:53,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:21:53,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:21:53,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:21:53,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:21:53,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:21:53,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:21:53,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:21:53,580 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:21:53,580 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:21:53,580 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:21:53,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:21:53,581 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:21:53,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:21:53,581 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2023-12-02 15:21:53,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:21:53,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:21:53,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:21:53,887 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:21:53,887 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:21:53,888 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2023-12-02 15:21:56,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:21:56,878 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:21:56,879 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2023-12-02 15:21:56,887 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/data/c9b7dbe4a/bea9c048ea3b4eecb4909674ae4de499/FLAGaf26b9c4b [2023-12-02 15:21:56,901 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/data/c9b7dbe4a/bea9c048ea3b4eecb4909674ae4de499 [2023-12-02 15:21:56,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:21:56,905 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:21:56,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:21:56,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:21:56,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:21:56,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:21:56" (1/1) ... [2023-12-02 15:21:56,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c86260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:56, skipping insertion in model container [2023-12-02 15:21:56,914 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:21:56" (1/1) ... [2023-12-02 15:21:56,937 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:21:57,101 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_47d6fa1c-b4fc-4099-a459-69b7859e6beb/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2023-12-02 15:21:57,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:21:57,138 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:21:57,150 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_47d6fa1c-b4fc-4099-a459-69b7859e6beb/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2023-12-02 15:21:57,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:21:57,182 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:21:57,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57 WrapperNode [2023-12-02 15:21:57,183 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:21:57,183 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:21:57,184 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:21:57,184 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:21:57,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,198 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,222 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2023-12-02 15:21:57,223 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:21:57,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:21:57,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:21:57,224 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:21:57,231 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,231 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,240 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,246 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,247 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,252 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:21:57,253 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:21:57,253 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:21:57,253 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:21:57,254 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (1/1) ... [2023-12-02 15:21:57,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:21:57,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:21:57,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:21:57,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:21:57,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:21:57,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:21:57,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:21:57,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:21:57,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:21:57,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:21:57,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:21:57,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:21:57,373 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:21:57,375 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:21:57,569 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:21:57,646 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:21:57,646 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-12-02 15:21:57,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:21:57 BoogieIcfgContainer [2023-12-02 15:21:57,648 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:21:57,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:21:57,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:21:57,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:21:57,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:21:56" (1/3) ... [2023-12-02 15:21:57,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62be03d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:21:57, skipping insertion in model container [2023-12-02 15:21:57,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:21:57" (2/3) ... [2023-12-02 15:21:57,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62be03d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:21:57, skipping insertion in model container [2023-12-02 15:21:57,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:21:57" (3/3) ... [2023-12-02 15:21:57,659 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2023-12-02 15:21:57,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:21:57,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:21:57,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:21:57,731 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=FINITE_AUTOMATA, 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;@4ecd62b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:21:57,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:21:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:21:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 15:21:57,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:21:57,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:21:57,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:21:57,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:21:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2023-12-02 15:21:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:21:57,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401502188] [2023-12-02 15:21:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:21:57,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:21:57,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:21:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832825945] [2023-12-02 15:21:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:21:57,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:21:57,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:21:57,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:21:57,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:21:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:21:57,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:21:57,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:21:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:21:57,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:21:58,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:21:58,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401502188] [2023-12-02 15:21:58,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:21:58,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832825945] [2023-12-02 15:21:58,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832825945] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:21:58,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:21:58,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:21:58,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501566175] [2023-12-02 15:21:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:21:58,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:21:58,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:21:58,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:21:58,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:21:58,045 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.0) 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) [2023-12-02 15:21:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:21:58,123 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2023-12-02 15:21:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:21:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) 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 [2023-12-02 15:21:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:21:58,134 INFO L225 Difference]: With dead ends: 35 [2023-12-02 15:21:58,135 INFO L226 Difference]: Without dead ends: 20 [2023-12-02 15:21:58,138 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 [2023-12-02 15:21:58,142 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:21:58,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:21:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-02 15:21:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-12-02 15:21:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 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) [2023-12-02 15:21:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2023-12-02 15:21:58,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 9 [2023-12-02 15:21:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:21:58,177 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2023-12-02 15:21:58,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) 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) [2023-12-02 15:21:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2023-12-02 15:21:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:21:58,178 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:21:58,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:21:58,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:21:58,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 15:21:58,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:21:58,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:21:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash 648526984, now seen corresponding path program 1 times [2023-12-02 15:21:58,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:21:58,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120044740] [2023-12-02 15:21:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:21:58,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:21:58,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:21:58,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130124462] [2023-12-02 15:21:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:21:58,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:21:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:21:58,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:21:58,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:21:58,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:21:58,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:21:58,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:21:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:21:58,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:21:58,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:21:58,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120044740] [2023-12-02 15:21:58,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:21:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130124462] [2023-12-02 15:21:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130124462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:21:58,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:21:58,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:21:58,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145364675] [2023-12-02 15:21:58,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:21:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:21:58,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:21:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:21:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:21:58,486 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:21:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:21:58,579 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2023-12-02 15:21:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:21:58,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2023-12-02 15:21:58,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:21:58,581 INFO L225 Difference]: With dead ends: 47 [2023-12-02 15:21:58,582 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 15:21:58,582 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 [2023-12-02 15:21:58,584 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:21:58,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 9 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:21:58,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 15:21:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2023-12-02 15:21:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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) [2023-12-02 15:21:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2023-12-02 15:21:58,594 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 11 [2023-12-02 15:21:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:21:58,595 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2023-12-02 15:21:58,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:21:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2023-12-02 15:21:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 15:21:58,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:21:58,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:21:58,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:21:58,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:21:58,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:21:58,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:21:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash -603899039, now seen corresponding path program 1 times [2023-12-02 15:21:58,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:21:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431009244] [2023-12-02 15:21:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:21:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:21:58,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:21:58,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387630962] [2023-12-02 15:21:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:21:58,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:21:58,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:21:58,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:21:58,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:21:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:21:58,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:21:58,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:21:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:21:58,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:21:58,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:21:58,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431009244] [2023-12-02 15:21:58,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:21:58,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387630962] [2023-12-02 15:21:58,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387630962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:21:58,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:21:58,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:21:58,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181136857] [2023-12-02 15:21:58,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:21:58,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:21:58,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:21:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:21:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:21:58,912 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2023-12-02 15:21:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:21:59,003 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2023-12-02 15:21:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:21:59,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 13 [2023-12-02 15:21:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:21:59,005 INFO L225 Difference]: With dead ends: 50 [2023-12-02 15:21:59,005 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 15:21:59,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:21:59,007 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:21:59,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:21:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 15:21:59,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2023-12-02 15:21:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 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) [2023-12-02 15:21:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2023-12-02 15:21:59,017 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 13 [2023-12-02 15:21:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:21:59,017 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2023-12-02 15:21:59,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2023-12-02 15:21:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2023-12-02 15:21:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 15:21:59,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:21:59,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:21:59,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:21:59,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 15:21:59,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:21:59,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:21:59,221 INFO L85 PathProgramCache]: Analyzing trace with hash -972286329, now seen corresponding path program 1 times [2023-12-02 15:21:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:21:59,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063223591] [2023-12-02 15:21:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:21:59,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:21:59,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:21:59,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680454979] [2023-12-02 15:21:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:21:59,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:21:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:21:59,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:21:59,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:21:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:21:59,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:21:59,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:21:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:21:59,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:21:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:21:59,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:21:59,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063223591] [2023-12-02 15:21:59,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:21:59,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680454979] [2023-12-02 15:21:59,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680454979] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:21:59,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505185763] [2023-12-02 15:21:59,436 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 15:21:59,436 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:21:59,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:21:59,445 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:21:59,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:00,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [505185763] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:22:00,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:00,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2023-12-02 15:22:00,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863613303] [2023-12-02 15:22:00,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:22:00,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:22:00,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:22:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:22:00,825 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2023-12-02 15:22:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:01,184 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2023-12-02 15:22:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:22:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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 14 [2023-12-02 15:22:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:01,186 INFO L225 Difference]: With dead ends: 48 [2023-12-02 15:22:01,186 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 15:22:01,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:22:01,187 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:01,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:22:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 15:22:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2023-12-02 15:22:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 36 transitions. [2023-12-02 15:22:01,202 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 36 transitions. Word has length 14 [2023-12-02 15:22:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:01,202 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 36 transitions. [2023-12-02 15:22:01,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2023-12-02 15:22:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 36 transitions. [2023-12-02 15:22:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 15:22:01,203 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:01,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:01,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:22:01,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-02 15:22:01,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:01,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash -626333865, now seen corresponding path program 1 times [2023-12-02 15:22:01,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:01,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005596496] [2023-12-02 15:22:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:01,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:01,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:01,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640047324] [2023-12-02 15:22:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:01,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:01,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:22:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:22:01,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:22:01,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:22:01,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:22:01,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005596496] [2023-12-02 15:22:01,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640047324] [2023-12-02 15:22:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640047324] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056183508] [2023-12-02 15:22:01,532 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 15:22:01,532 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:01,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:01,533 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:01,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:02,161 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:02,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1056183508] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:22:02,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:02,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 14 [2023-12-02 15:22:02,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953679220] [2023-12-02 15:22:02,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:22:02,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:22:02,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:22:02,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:22:02,295 INFO L87 Difference]: Start difference. First operand 24 states and 36 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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) [2023-12-02 15:22:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:02,563 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2023-12-02 15:22:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:22:02,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 15:22:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:02,565 INFO L225 Difference]: With dead ends: 54 [2023-12-02 15:22:02,565 INFO L226 Difference]: Without dead ends: 39 [2023-12-02 15:22:02,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:22:02,567 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:02,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:22:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-02 15:22:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2023-12-02 15:22:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 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) [2023-12-02 15:22:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2023-12-02 15:22:02,579 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 16 [2023-12-02 15:22:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:02,580 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2023-12-02 15:22:02,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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) [2023-12-02 15:22:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2023-12-02 15:22:02,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 15:22:02,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:02,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:02,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 15:22:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:02,781 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:02,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1603790307, now seen corresponding path program 1 times [2023-12-02 15:22:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462689634] [2023-12-02 15:22:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:02,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:02,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109352689] [2023-12-02 15:22:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:02,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:02,790 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:02,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 15:22:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:22:02,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:22:02,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:22:02,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:22:02,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462689634] [2023-12-02 15:22:02,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109352689] [2023-12-02 15:22:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109352689] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308000978] [2023-12-02 15:22:02,897 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 15:22:02,897 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:02,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:02,897 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:02,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:03,632 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:03,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [308000978] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:22:03,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:03,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2023-12-02 15:22:03,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718588993] [2023-12-02 15:22:03,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:22:03,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:22:03,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:22:03,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:22:03,706 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:03,878 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2023-12-02 15:22:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:22:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2023-12-02 15:22:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:03,881 INFO L225 Difference]: With dead ends: 51 [2023-12-02 15:22:03,881 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 15:22:03,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:22:03,883 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:03,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 6 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 15:22:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2023-12-02 15:22:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2023-12-02 15:22:03,899 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 16 [2023-12-02 15:22:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:03,899 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2023-12-02 15:22:03,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2023-12-02 15:22:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 15:22:03,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:03,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:03,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 15:22:04,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 15:22:04,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:04,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:04,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1749873230, now seen corresponding path program 1 times [2023-12-02 15:22:04,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:04,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534057953] [2023-12-02 15:22:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:04,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:04,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:04,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943711073] [2023-12-02 15:22:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:04,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:04,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:04,115 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:04,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:22:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:22:04,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:22:04,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 15:22:04,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 15:22:04,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:04,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534057953] [2023-12-02 15:22:04,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:04,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943711073] [2023-12-02 15:22:04,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943711073] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:04,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611743483] [2023-12-02 15:22:04,237 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 15:22:04,237 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:04,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:04,238 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:04,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:04,791 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:04,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1282#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:04,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:04,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:04,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-12-02 15:22:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397520853] [2023-12-02 15:22:04,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:04,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:22:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:22:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:22:04,992 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:05,163 INFO L93 Difference]: Finished difference Result 87 states and 135 transitions. [2023-12-02 15:22:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:22:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 19 [2023-12-02 15:22:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:05,164 INFO L225 Difference]: With dead ends: 87 [2023-12-02 15:22:05,164 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 15:22:05,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-12-02 15:22:05,166 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 141 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:05,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 14 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 15:22:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2023-12-02 15:22:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2023-12-02 15:22:05,180 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 19 [2023-12-02 15:22:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:05,180 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2023-12-02 15:22:05,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2023-12-02 15:22:05,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 15:22:05,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:05,181 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:05,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:22:05,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 15:22:05,382 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:05,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1650596916, now seen corresponding path program 2 times [2023-12-02 15:22:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:05,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834936060] [2023-12-02 15:22:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:05,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:05,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448155394] [2023-12-02 15:22:05,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:22:05,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:05,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:05,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:05,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 15:22:05,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 15:22:05,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:22:05,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:22:05,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 15:22:05,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:22:05,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834936060] [2023-12-02 15:22:05,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448155394] [2023-12-02 15:22:05,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448155394] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:22:05,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:22:05,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:22:05,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450988770] [2023-12-02 15:22:05,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:22:05,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:22:05,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:22:05,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:22:05,516 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2023-12-02 15:22:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:05,598 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2023-12-02 15:22:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:22:05,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 22 [2023-12-02 15:22:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:05,599 INFO L225 Difference]: With dead ends: 83 [2023-12-02 15:22:05,600 INFO L226 Difference]: Without dead ends: 65 [2023-12-02 15:22:05,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:22:05,601 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 50 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:05,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 8 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-02 15:22:05,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2023-12-02 15:22:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2023-12-02 15:22:05,636 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 22 [2023-12-02 15:22:05,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:05,636 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2023-12-02 15:22:05,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2023-12-02 15:22:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2023-12-02 15:22:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:22:05,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:05,637 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:05,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 15:22:05,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 15:22:05,838 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:05,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:05,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1048786000, now seen corresponding path program 1 times [2023-12-02 15:22:05,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:05,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789641233] [2023-12-02 15:22:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:05,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:05,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:05,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893159250] [2023-12-02 15:22:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:05,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:05,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:05,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:05,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 15:22:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:22:05,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:22:05,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:22:05,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:22:06,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789641233] [2023-12-02 15:22:06,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893159250] [2023-12-02 15:22:06,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893159250] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:06,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218319987] [2023-12-02 15:22:06,022 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:06,022 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:06,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:06,023 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:06,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:06,478 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:06,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1934#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:06,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:06,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:06,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-12-02 15:22:06,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126984626] [2023-12-02 15:22:06,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:06,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 15:22:06,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 15:22:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-12-02 15:22:06,664 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:07,009 INFO L93 Difference]: Finished difference Result 177 states and 264 transitions. [2023-12-02 15:22:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:22:07,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 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 24 [2023-12-02 15:22:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:07,011 INFO L225 Difference]: With dead ends: 177 [2023-12-02 15:22:07,011 INFO L226 Difference]: Without dead ends: 141 [2023-12-02 15:22:07,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2023-12-02 15:22:07,013 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 238 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:07,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 32 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:22:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-12-02 15:22:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 62. [2023-12-02 15:22:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2023-12-02 15:22:07,036 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 24 [2023-12-02 15:22:07,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:07,036 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2023-12-02 15:22:07,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2023-12-02 15:22:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 15:22:07,037 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:07,037 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:07,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 15:22:07,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:07,238 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:07,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:07,239 INFO L85 PathProgramCache]: Analyzing trace with hash 152186384, now seen corresponding path program 2 times [2023-12-02 15:22:07,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:07,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503630814] [2023-12-02 15:22:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:07,254 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:07,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562066723] [2023-12-02 15:22:07,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:22:07,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:07,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:07,256 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:07,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 15:22:07,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:22:07,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:22:07,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:22:07,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 15:22:07,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 15:22:07,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503630814] [2023-12-02 15:22:07,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562066723] [2023-12-02 15:22:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562066723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:07,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766737296] [2023-12-02 15:22:07,423 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:07,423 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:07,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:07,423 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:07,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:08,156 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:08,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2542#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:08,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:08,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:08,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-12-02 15:22:08,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637630714] [2023-12-02 15:22:08,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:08,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:22:08,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:22:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-12-02 15:22:08,382 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2023-12-02 15:22:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:08,544 INFO L93 Difference]: Finished difference Result 310 states and 408 transitions. [2023-12-02 15:22:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:22:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 30 [2023-12-02 15:22:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:08,546 INFO L225 Difference]: With dead ends: 310 [2023-12-02 15:22:08,546 INFO L226 Difference]: Without dead ends: 270 [2023-12-02 15:22:08,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-12-02 15:22:08,547 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 148 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:08,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 31 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-12-02 15:22:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 71. [2023-12-02 15:22:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2023-12-02 15:22:08,590 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 30 [2023-12-02 15:22:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:08,591 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2023-12-02 15:22:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2023-12-02 15:22:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2023-12-02 15:22:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 15:22:08,593 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:08,593 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:08,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 15:22:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:08,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:08,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1067494720, now seen corresponding path program 3 times [2023-12-02 15:22:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:08,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54816650] [2023-12-02 15:22:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:08,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013026459] [2023-12-02 15:22:08,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:22:08,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:08,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:08,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:08,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 15:22:08,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:22:08,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:22:08,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:22:08,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 15:22:08,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 15:22:08,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:08,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54816650] [2023-12-02 15:22:08,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:08,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013026459] [2023-12-02 15:22:08,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013026459] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:08,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183126231] [2023-12-02 15:22:08,952 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:08,952 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:08,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:08,953 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:08,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:09,430 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:09,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3385#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:09,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:09,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:09,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-02 15:22:09,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962872574] [2023-12-02 15:22:09,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:22:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:22:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-12-02 15:22:09,596 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2023-12-02 15:22:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:09,910 INFO L93 Difference]: Finished difference Result 180 states and 272 transitions. [2023-12-02 15:22:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:22:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 36 [2023-12-02 15:22:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:09,911 INFO L225 Difference]: With dead ends: 180 [2023-12-02 15:22:09,911 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 15:22:09,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2023-12-02 15:22:09,913 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:09,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 32 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 15:22:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2023-12-02 15:22:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3875) internal successors, (111), 80 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 111 transitions. [2023-12-02 15:22:09,965 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 111 transitions. Word has length 36 [2023-12-02 15:22:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:09,965 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 111 transitions. [2023-12-02 15:22:09,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2023-12-02 15:22:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 111 transitions. [2023-12-02 15:22:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 15:22:09,966 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:09,966 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:09,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 15:22:10,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 15:22:10,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:10,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:10,167 INFO L85 PathProgramCache]: Analyzing trace with hash -920204135, now seen corresponding path program 4 times [2023-12-02 15:22:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:10,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241723926] [2023-12-02 15:22:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:10,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:10,180 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:10,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868252203] [2023-12-02 15:22:10,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:22:10,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:10,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:10,181 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:10,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 15:22:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:22:10,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:22:10,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 15:22:10,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 15:22:10,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:10,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241723926] [2023-12-02 15:22:10,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:10,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868252203] [2023-12-02 15:22:10,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868252203] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:10,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928398691] [2023-12-02 15:22:10,612 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:10,612 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:10,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:10,613 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:10,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:11,117 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:11,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4104#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:11,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:11,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:11,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-12-02 15:22:11,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694382345] [2023-12-02 15:22:11,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:11,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 15:22:11,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:11,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 15:22:11,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 15:22:11,362 INFO L87 Difference]: Start difference. First operand 81 states and 111 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2023-12-02 15:22:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:12,530 INFO L93 Difference]: Finished difference Result 629 states and 976 transitions. [2023-12-02 15:22:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 15:22:12,530 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) Word has length 37 [2023-12-02 15:22:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:12,533 INFO L225 Difference]: With dead ends: 629 [2023-12-02 15:22:12,533 INFO L226 Difference]: Without dead ends: 550 [2023-12-02 15:22:12,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=646, Invalid=1706, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 15:22:12,535 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 731 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:12,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 68 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:22:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-12-02 15:22:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 129. [2023-12-02 15:22:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.3359375) internal successors, (171), 128 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2023-12-02 15:22:12,577 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 37 [2023-12-02 15:22:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:12,577 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2023-12-02 15:22:12,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2023-12-02 15:22:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2023-12-02 15:22:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 15:22:12,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:12,578 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:12,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 15:22:12,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 15:22:12,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:12,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash 912316697, now seen corresponding path program 5 times [2023-12-02 15:22:12,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:12,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117194577] [2023-12-02 15:22:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:12,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:12,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926644680] [2023-12-02 15:22:12,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:22:12,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:12,794 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:12,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:22:12,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:22:12,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:22:12,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:22:12,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2023-12-02 15:22:12,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2023-12-02 15:22:12,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117194577] [2023-12-02 15:22:12,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926644680] [2023-12-02 15:22:12,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926644680] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090503318] [2023-12-02 15:22:12,981 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:12,981 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:12,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:12,981 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:12,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:13,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:13,735 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5790#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:13,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:13,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:13,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 15:22:13,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89184541] [2023-12-02 15:22:13,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:13,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:22:13,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:22:13,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:22:13,736 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:13,869 INFO L93 Difference]: Finished difference Result 308 states and 398 transitions. [2023-12-02 15:22:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:22:13,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-02 15:22:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:13,871 INFO L225 Difference]: With dead ends: 308 [2023-12-02 15:22:13,871 INFO L226 Difference]: Without dead ends: 207 [2023-12-02 15:22:13,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:22:13,873 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:13,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 14 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-12-02 15:22:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-12-02 15:22:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2378640776699028) internal successors, (255), 206 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 255 transitions. [2023-12-02 15:22:13,940 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 255 transitions. Word has length 49 [2023-12-02 15:22:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:13,940 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 255 transitions. [2023-12-02 15:22:13,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 255 transitions. [2023-12-02 15:22:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 15:22:13,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:13,943 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:13,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:22:14,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 15:22:14,144 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:14,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1033818990, now seen corresponding path program 6 times [2023-12-02 15:22:14,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:14,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246476867] [2023-12-02 15:22:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:14,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:14,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:14,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644752911] [2023-12-02 15:22:14,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:22:14,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:14,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:14,185 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:14,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 15:22:14,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:22:14,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:22:14,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:22:14,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4248 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4234 trivial. 0 not checked. [2023-12-02 15:22:14,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4248 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4234 trivial. 0 not checked. [2023-12-02 15:22:14,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:14,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246476867] [2023-12-02 15:22:14,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:14,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644752911] [2023-12-02 15:22:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644752911] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548134514] [2023-12-02 15:22:14,413 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:14,413 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:14,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:14,414 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:14,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:14,871 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:15,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7459#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:15,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:15,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:15,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-02 15:22:15,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896545408] [2023-12-02 15:22:15,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:15,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:22:15,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:15,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:22:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-12-02 15:22:15,073 INFO L87 Difference]: Start difference. First operand 207 states and 255 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2023-12-02 15:22:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:15,503 INFO L93 Difference]: Finished difference Result 685 states and 832 transitions. [2023-12-02 15:22:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:22:15,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 127 [2023-12-02 15:22:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:15,507 INFO L225 Difference]: With dead ends: 685 [2023-12-02 15:22:15,507 INFO L226 Difference]: Without dead ends: 590 [2023-12-02 15:22:15,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2023-12-02 15:22:15,508 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:15,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 33 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-12-02 15:22:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 226. [2023-12-02 15:22:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.2577777777777779) internal successors, (283), 225 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2023-12-02 15:22:15,599 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 127 [2023-12-02 15:22:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:15,599 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2023-12-02 15:22:15,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2023-12-02 15:22:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2023-12-02 15:22:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 15:22:15,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:15,601 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:15,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-02 15:22:15,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 15:22:15,801 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:15,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash -764102070, now seen corresponding path program 7 times [2023-12-02 15:22:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185873313] [2023-12-02 15:22:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:15,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:15,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:15,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261196062] [2023-12-02 15:22:15,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:22:15,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:15,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:15,849 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:15,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 15:22:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:22:16,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 15:22:16,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2023-12-02 15:22:16,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 2414 trivial. 0 not checked. [2023-12-02 15:22:16,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:16,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185873313] [2023-12-02 15:22:16,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:16,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261196062] [2023-12-02 15:22:16,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261196062] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:16,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476093340] [2023-12-02 15:22:16,878 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:16,879 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:16,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:16,879 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:16,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:17,347 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:17,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9949#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:17,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:17,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:17,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-12-02 15:22:17,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827253541] [2023-12-02 15:22:17,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:17,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 15:22:17,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 15:22:17,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1236, Invalid=2546, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 15:22:17,535 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 49 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) [2023-12-02 15:22:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:21,431 INFO L93 Difference]: Finished difference Result 1867 states and 2837 transitions. [2023-12-02 15:22:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-02 15:22:21,431 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 49 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) Word has length 131 [2023-12-02 15:22:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:21,440 INFO L225 Difference]: With dead ends: 1867 [2023-12-02 15:22:21,440 INFO L226 Difference]: Without dead ends: 1644 [2023-12-02 15:22:21,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2386, Invalid=4754, Unknown=0, NotChecked=0, Total=7140 [2023-12-02 15:22:21,444 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1339 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 668 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:21,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1339 Valid, 140 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [668 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:22:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2023-12-02 15:22:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 394. [2023-12-02 15:22:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.2086513994910941) internal successors, (475), 393 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 475 transitions. [2023-12-02 15:22:21,623 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 475 transitions. Word has length 131 [2023-12-02 15:22:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:21,623 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 475 transitions. [2023-12-02 15:22:21,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 49 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) [2023-12-02 15:22:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 475 transitions. [2023-12-02 15:22:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-02 15:22:21,626 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:21,626 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:21,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 15:22:21,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:21,827 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:21,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:21,827 INFO L85 PathProgramCache]: Analyzing trace with hash 538656842, now seen corresponding path program 8 times [2023-12-02 15:22:21,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:21,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054964158] [2023-12-02 15:22:21,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:21,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:21,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:21,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833427195] [2023-12-02 15:22:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:22:21,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:21,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:21,899 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:21,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 15:22:22,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:22:22,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:22:22,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:22:22,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17657 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17656 trivial. 0 not checked. [2023-12-02 15:22:22,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17657 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17656 trivial. 0 not checked. [2023-12-02 15:22:22,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054964158] [2023-12-02 15:22:22,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833427195] [2023-12-02 15:22:22,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833427195] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181853818] [2023-12-02 15:22:22,974 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:22,974 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:22,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:22,975 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:22,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:23,385 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:23,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15567#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:23,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:23,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:23,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-12-02 15:22:23,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121680270] [2023-12-02 15:22:23,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:23,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:22:23,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:22:23,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-12-02 15:22:23,589 INFO L87 Difference]: Start difference. First operand 394 states and 475 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:23,947 INFO L93 Difference]: Finished difference Result 980 states and 1258 transitions. [2023-12-02 15:22:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:22:23,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 227 [2023-12-02 15:22:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:23,952 INFO L225 Difference]: With dead ends: 980 [2023-12-02 15:22:23,952 INFO L226 Difference]: Without dead ends: 836 [2023-12-02 15:22:23,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-12-02 15:22:23,953 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 146 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:23,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 16 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2023-12-02 15:22:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 403. [2023-12-02 15:22:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.2189054726368158) internal successors, (490), 402 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 490 transitions. [2023-12-02 15:22:24,120 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 490 transitions. Word has length 227 [2023-12-02 15:22:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:24,121 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 490 transitions. [2023-12-02 15:22:24,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 490 transitions. [2023-12-02 15:22:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-12-02 15:22:24,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:24,123 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:24,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 15:22:24,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:24,324 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:24,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1992975586, now seen corresponding path program 9 times [2023-12-02 15:22:24,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:24,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061072734] [2023-12-02 15:22:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:24,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:24,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:24,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877411989] [2023-12-02 15:22:24,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:22:24,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:24,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:24,409 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:24,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 15:22:24,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:22:24,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:22:24,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:22:24,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17672 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 17643 trivial. 0 not checked. [2023-12-02 15:22:24,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17672 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 17643 trivial. 0 not checked. [2023-12-02 15:22:24,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:24,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061072734] [2023-12-02 15:22:24,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:24,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877411989] [2023-12-02 15:22:24,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877411989] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:24,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589600974] [2023-12-02 15:22:24,813 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:24,813 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:24,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:24,814 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:24,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:25,352 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:25,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19188#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:25,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:25,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:25,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-02 15:22:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918636274] [2023-12-02 15:22:25,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:25,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:22:25,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:22:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-12-02 15:22:25,569 INFO L87 Difference]: Start difference. First operand 403 states and 490 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:26,091 INFO L93 Difference]: Finished difference Result 1261 states and 1524 transitions. [2023-12-02 15:22:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:22:26,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 233 [2023-12-02 15:22:26,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:26,096 INFO L225 Difference]: With dead ends: 1261 [2023-12-02 15:22:26,096 INFO L226 Difference]: Without dead ends: 1080 [2023-12-02 15:22:26,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 684 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2023-12-02 15:22:26,098 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:26,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 25 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 15:22:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2023-12-02 15:22:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 404. [2023-12-02 15:22:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.2109181141439207) internal successors, (488), 403 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 488 transitions. [2023-12-02 15:22:26,332 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 488 transitions. Word has length 233 [2023-12-02 15:22:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:26,332 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 488 transitions. [2023-12-02 15:22:26,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 488 transitions. [2023-12-02 15:22:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-12-02 15:22:26,336 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:26,336 INFO L195 NwaCegarLoop]: trace histogram [184, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:26,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 15:22:26,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 15:22:26,537 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:26,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:26,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1577512954, now seen corresponding path program 10 times [2023-12-02 15:22:26,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:26,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335961766] [2023-12-02 15:22:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:26,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:26,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:26,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770996785] [2023-12-02 15:22:26,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:22:26,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:26,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:26,643 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:26,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 15:22:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:22:27,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 1991 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 15:22:27,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17898 backedges. 6638 proven. 1081 refuted. 0 times theorem prover too weak. 10179 trivial. 0 not checked. [2023-12-02 15:22:28,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:22:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17898 backedges. 6638 proven. 1081 refuted. 0 times theorem prover too weak. 10179 trivial. 0 not checked. [2023-12-02 15:22:30,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335961766] [2023-12-02 15:22:30,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770996785] [2023-12-02 15:22:30,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770996785] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:22:30,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [884889158] [2023-12-02 15:22:30,209 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 15:22:30,209 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:22:30,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:22:30,210 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:22:30,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:22:30,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:22:30,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23679#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:22:30,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:22:30,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:22:30,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2023-12-02 15:22:30,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973919663] [2023-12-02 15:22:30,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:22:30,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-12-02 15:22:30,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-12-02 15:22:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4716, Invalid=7274, Unknown=0, NotChecked=0, Total=11990 [2023-12-02 15:22:30,985 INFO L87 Difference]: Start difference. First operand 404 states and 488 transitions. Second operand has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 97 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:49,801 INFO L93 Difference]: Finished difference Result 4297 states and 6514 transitions. [2023-12-02 15:22:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-12-02 15:22:49,801 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 97 states have internal predecessors, (120), 0 states have call successors, (0), 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 253 [2023-12-02 15:22:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:49,815 INFO L225 Difference]: With dead ends: 4297 [2023-12-02 15:22:49,815 INFO L226 Difference]: Without dead ends: 3896 [2023-12-02 15:22:49,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9322, Invalid=15170, Unknown=0, NotChecked=0, Total=24492 [2023-12-02 15:22:49,822 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3873 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 1876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3873 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1876 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:49,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3873 Valid, 284 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1876 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 15:22:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2023-12-02 15:22:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 740. [2023-12-02 15:22:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.1799729364005414) internal successors, (872), 739 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 872 transitions. [2023-12-02 15:22:50,147 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 872 transitions. Word has length 253 [2023-12-02 15:22:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:50,147 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 872 transitions. [2023-12-02 15:22:50,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 97 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 872 transitions. [2023-12-02 15:22:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2023-12-02 15:22:50,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:50,149 INFO L195 NwaCegarLoop]: trace histogram [376, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:50,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 15:22:50,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 15:22:50,349 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:50,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash -447407098, now seen corresponding path program 11 times [2023-12-02 15:22:50,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:50,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462492932] [2023-12-02 15:22:50,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:50,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:50,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:50,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300582809] [2023-12-02 15:22:50,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:22:50,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:50,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:50,528 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:50,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 15:22:51,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 15:22:51,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:22:51,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 15:22:51,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 72330 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72323 trivial. 0 not checked. [2023-12-02 15:22:51,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:22:51,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:22:51,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462492932] [2023-12-02 15:22:51,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:22:51,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300582809] [2023-12-02 15:22:51,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300582809] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:22:51,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:22:51,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:22:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956782512] [2023-12-02 15:22:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:22:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:22:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:22:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:22:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:22:51,914 INFO L87 Difference]: Start difference. First operand 740 states and 872 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:22:52,529 INFO L93 Difference]: Finished difference Result 1712 states and 2052 transitions. [2023-12-02 15:22:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:22:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 445 [2023-12-02 15:22:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:22:52,535 INFO L225 Difference]: With dead ends: 1712 [2023-12-02 15:22:52,535 INFO L226 Difference]: Without dead ends: 1414 [2023-12-02 15:22:52,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:22:52,536 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:22:52,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 8 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:22:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2023-12-02 15:22:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 744. [2023-12-02 15:22:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 1.1790040376850606) internal successors, (876), 743 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 876 transitions. [2023-12-02 15:22:52,869 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 876 transitions. Word has length 445 [2023-12-02 15:22:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:22:52,869 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 876 transitions. [2023-12-02 15:22:52,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:22:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 876 transitions. [2023-12-02 15:22:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-12-02 15:22:52,871 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:22:52,871 INFO L195 NwaCegarLoop]: trace histogram [376, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:22:52,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 15:22:53,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:53,072 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:22:53,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:22:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1914297498, now seen corresponding path program 1 times [2023-12-02 15:22:53,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:22:53,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575198808] [2023-12-02 15:22:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:53,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:22:53,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:22:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121433471] [2023-12-02 15:22:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:22:53,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:22:53,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:22:53,229 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:22:53,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 15:22:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:22:54,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 3743 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-02 15:22:54,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:22:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72358 backedges. 27086 proven. 4465 refuted. 0 times theorem prover too weak. 40807 trivial. 0 not checked. [2023-12-02 15:22:57,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:23:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 72358 backedges. 27086 proven. 4465 refuted. 0 times theorem prover too weak. 40807 trivial. 0 not checked. [2023-12-02 15:23:04,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:23:04,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575198808] [2023-12-02 15:23:04,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:23:04,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121433471] [2023-12-02 15:23:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121433471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:23:04,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178587803] [2023-12-02 15:23:04,676 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 15:23:04,676 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:23:04,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:23:04,676 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:23:04,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:23:05,076 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:23:05,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41591#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:23:05,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:23:05,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:23:05,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2023-12-02 15:23:05,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9927355] [2023-12-02 15:23:05,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:23:05,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-12-02 15:23:05,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:23:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-12-02 15:23:05,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18592, Invalid=24050, Unknown=0, NotChecked=0, Total=42642 [2023-12-02 15:23:05,317 INFO L87 Difference]: Start difference. First operand 744 states and 876 transitions. Second operand has 194 states, 194 states have (on average 1.1237113402061856) internal successors, (218), 193 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) [2023-12-02 15:24:58,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:24:58,594 INFO L93 Difference]: Finished difference Result 7247 states and 10722 transitions. [2023-12-02 15:24:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-12-02 15:24:58,594 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.1237113402061856) internal successors, (218), 193 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) Word has length 453 [2023-12-02 15:24:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:24:58,617 INFO L225 Difference]: With dead ends: 7247 [2023-12-02 15:24:58,617 INFO L226 Difference]: Without dead ends: 6506 [2023-12-02 15:24:58,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1452 GetRequests, 1152 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23777 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=37022, Invalid=53880, Unknown=0, NotChecked=0, Total=90902 [2023-12-02 15:24:58,625 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7804 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 4130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7804 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 5700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4130 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:24:58,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7804 Valid, 572 Invalid, 5700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4130 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 15:24:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2023-12-02 15:24:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 1416. [2023-12-02 15:24:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 1.1618374558303888) internal successors, (1644), 1415 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:24:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1644 transitions. [2023-12-02 15:24:59,301 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1644 transitions. Word has length 453 [2023-12-02 15:24:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:24:59,301 INFO L495 AbstractCegarLoop]: Abstraction has 1416 states and 1644 transitions. [2023-12-02 15:24:59,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.1237113402061856) internal successors, (218), 193 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) [2023-12-02 15:24:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1644 transitions. [2023-12-02 15:24:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2023-12-02 15:24:59,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:24:59,309 INFO L195 NwaCegarLoop]: trace histogram [760, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:24:59,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 15:24:59,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:24:59,510 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:24:59,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:24:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1454246758, now seen corresponding path program 2 times [2023-12-02 15:24:59,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:24:59,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313476875] [2023-12-02 15:24:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:24:59,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:24:59,793 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:24:59,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738597647] [2023-12-02 15:24:59,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:24:59,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:24:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:24:59,795 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:24:59,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 15:25:00,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 15:25:00,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:25:00,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:25:00,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:25:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 291814 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 291780 trivial. 0 not checked. [2023-12-02 15:25:01,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:25:01,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:25:01,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313476875] [2023-12-02 15:25:01,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:25:01,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738597647] [2023-12-02 15:25:01,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738597647] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:25:01,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:25:01,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:25:01,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689993725] [2023-12-02 15:25:01,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:25:01,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:25:01,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:25:01,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:25:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:25:01,492 INFO L87 Difference]: Start difference. First operand 1416 states and 1644 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:25:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:25:02,176 INFO L93 Difference]: Finished difference Result 2017 states and 2447 transitions. [2023-12-02 15:25:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:25:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 837 [2023-12-02 15:25:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:25:02,183 INFO L225 Difference]: With dead ends: 2017 [2023-12-02 15:25:02,183 INFO L226 Difference]: Without dead ends: 1420 [2023-12-02 15:25:02,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 834 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:25:02,185 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:25:02,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 11 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:25:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2023-12-02 15:25:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1417. [2023-12-02 15:25:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 1.1603107344632768) internal successors, (1643), 1416 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:25:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 1643 transitions. [2023-12-02 15:25:02,802 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 1643 transitions. Word has length 837 [2023-12-02 15:25:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:25:02,803 INFO L495 AbstractCegarLoop]: Abstraction has 1417 states and 1643 transitions. [2023-12-02 15:25:02,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:25:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 1643 transitions. [2023-12-02 15:25:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2023-12-02 15:25:02,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:25:02,808 INFO L195 NwaCegarLoop]: trace histogram [760, 14, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:25:02,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 15:25:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:25:03,009 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:25:03,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:25:03,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2118616194, now seen corresponding path program 3 times [2023-12-02 15:25:03,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:25:03,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666995748] [2023-12-02 15:25:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:25:03,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:25:03,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:25:03,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680699346] [2023-12-02 15:25:03,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:25:03,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:25:03,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:25:03,299 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:25:03,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 15:25:04,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:25:04,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:25:04,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:25:04,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:25:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 291855 backedges. 194 proven. 30 refuted. 0 times theorem prover too weak. 291631 trivial. 0 not checked. [2023-12-02 15:25:04,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:25:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 291855 backedges. 187 proven. 37 refuted. 0 times theorem prover too weak. 291631 trivial. 0 not checked. [2023-12-02 15:25:04,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:25:04,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666995748] [2023-12-02 15:25:04,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:25:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680699346] [2023-12-02 15:25:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680699346] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:25:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009058762] [2023-12-02 15:25:04,582 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 15:25:04,582 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:25:04,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:25:04,583 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:25:04,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:25:05,245 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:25:06,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71059#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (exists ((|v_ULTIMATE.start_main_~j~0#1_674| Int) (|v_ULTIMATE.start_main_~i~0#1_370| Int) (|v_ULTIMATE.start_main_~k~0#1_2049| Int)) (and (<= |ULTIMATE.start_main_~p~0#1| |v_ULTIMATE.start_main_~j~0#1_674|) (<= 0 |v_ULTIMATE.start_main_~k~0#1_2049|) (<= |ULTIMATE.start_main_~p~0#1| |v_ULTIMATE.start_main_~i~0#1_370|))) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:25:06,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:25:06,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:25:06,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-02 15:25:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057040515] [2023-12-02 15:25:06,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:25:06,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 15:25:06,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:25:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 15:25:06,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-12-02 15:25:06,049 INFO L87 Difference]: Start difference. First operand 1417 states and 1643 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:25:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:25:07,450 INFO L93 Difference]: Finished difference Result 2153 states and 2649 transitions. [2023-12-02 15:25:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 15:25:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 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 839 [2023-12-02 15:25:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:25:07,457 INFO L225 Difference]: With dead ends: 2153 [2023-12-02 15:25:07,457 INFO L226 Difference]: Without dead ends: 1503 [2023-12-02 15:25:07,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2532 GetRequests, 2467 SyntacticMatches, 23 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=414, Invalid=1478, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 15:25:07,459 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 83 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:25:07,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 35 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:25:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2023-12-02 15:25:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1440. [2023-12-02 15:25:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.1653926337734537) internal successors, (1677), 1439 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:25:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1677 transitions. [2023-12-02 15:25:08,190 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1677 transitions. Word has length 839 [2023-12-02 15:25:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:25:08,190 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 1677 transitions. [2023-12-02 15:25:08,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:25:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1677 transitions. [2023-12-02 15:25:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2023-12-02 15:25:08,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:25:08,195 INFO L195 NwaCegarLoop]: trace histogram [760, 18, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:25:08,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 15:25:08,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:25:08,396 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:25:08,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:25:08,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2072349266, now seen corresponding path program 4 times [2023-12-02 15:25:08,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:25:08,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037959086] [2023-12-02 15:25:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:25:08,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:25:08,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:25:08,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118823987] [2023-12-02 15:25:08,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 15:25:08,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:25:08,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:25:08,657 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:25:08,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47d6fa1c-b4fc-4099-a459-69b7859e6beb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 15:25:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:25:10,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 7241 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-02 15:25:10,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:25:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 291949 backedges. 109454 proven. 18145 refuted. 0 times theorem prover too weak. 164350 trivial. 0 not checked. [2023-12-02 15:25:24,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:25:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 291949 backedges. 109454 proven. 18145 refuted. 0 times theorem prover too weak. 164350 trivial. 0 not checked. [2023-12-02 15:25:51,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:25:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037959086] [2023-12-02 15:25:51,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:25:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118823987] [2023-12-02 15:25:51,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118823987] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:25:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789394521] [2023-12-02 15:25:51,369 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 15:25:51,370 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:25:51,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:25:51,370 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:25:51,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:25:51,901 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:25:52,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '82575#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) |ULTIMATE.start_main_~#B~0#1.offset|)) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~p~0#1|))' at error location [2023-12-02 15:25:52,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 15:25:52,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:25:52,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 385 [2023-12-02 15:25:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919090170] [2023-12-02 15:25:52,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 15:25:52,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-12-02 15:25:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:25:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-12-02 15:25:52,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73984, Invalid=84818, Unknown=0, NotChecked=0, Total=158802 [2023-12-02 15:25:52,202 INFO L87 Difference]: Start difference. First operand 1440 states and 1677 transitions. Second operand has 386 states, 386 states have (on average 1.0621761658031088) internal successors, (410), 385 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)