./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/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_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/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_37bd9f41-8752-481f-80e5-3d228bf72a34/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 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:56:18,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:56:18,767 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 15:56:18,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:56:18,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:56:18,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:56:18,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:56:18,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:56:18,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:56:18,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:56:18,796 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:56:18,796 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:56:18,797 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:56:18,797 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:56:18,798 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:56:18,798 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:56:18,799 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:56:18,799 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:56:18,800 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:56:18,800 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:56:18,800 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:56:18,801 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:56:18,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:56:18,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:56:18,802 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:56:18,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:56:18,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:56:18,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:56:18,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:56:18,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:56:18,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:56:18,805 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:56:18,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:56:18,805 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:56:18,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:56:18,806 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:56:18,806 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:56:18,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:56:18,806 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:56:18,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:56:18,807 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:56:18,807 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:56:18,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:56:18,807 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:56:18,808 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:56:18,808 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:56:18,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:56:18,808 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_37bd9f41-8752-481f-80e5-3d228bf72a34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f [2023-12-02 15:56:19,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:56:19,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:56:19,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:56:19,056 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:56:19,057 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:56:19,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2023-12-02 15:56:21,812 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:56:21,968 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:56:21,969 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2023-12-02 15:56:21,976 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/data/4f8feef5c/1ca2d3ad2f604098a70e482e9c5c1199/FLAG7146cad2b [2023-12-02 15:56:21,990 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/data/4f8feef5c/1ca2d3ad2f604098a70e482e9c5c1199 [2023-12-02 15:56:21,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:56:21,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:56:21,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:56:21,995 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:56:22,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:56:22,001 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:56:21" (1/1) ... [2023-12-02 15:56:22,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e901a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22, skipping insertion in model container [2023-12-02 15:56:22,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:56:21" (1/1) ... [2023-12-02 15:56:22,024 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:56:22,147 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_37bd9f41-8752-481f-80e5-3d228bf72a34/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2023-12-02 15:56:22,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:56:22,173 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:56:22,184 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_37bd9f41-8752-481f-80e5-3d228bf72a34/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2023-12-02 15:56:22,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:56:22,207 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:56:22,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22 WrapperNode [2023-12-02 15:56:22,207 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:56:22,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:56:22,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:56:22,209 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:56:22,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,222 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,237 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2023-12-02 15:56:22,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:56:22,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:56:22,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:56:22,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:56:22,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,249 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,256 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,258 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,260 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,261 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:56:22,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:56:22,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:56:22,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:56:22,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (1/1) ... [2023-12-02 15:56:22,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:56:22,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:22,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:56:22,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:56:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:56:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2023-12-02 15:56:22,327 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2023-12-02 15:56:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:56:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:56:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:56:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2023-12-02 15:56:22,327 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2023-12-02 15:56:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:56:22,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:56:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:56:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 15:56:22,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 15:56:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:56:22,408 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:56:22,411 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:56:22,608 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:56:22,659 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:56:22,660 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 15:56:22,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:56:22 BoogieIcfgContainer [2023-12-02 15:56:22,662 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:56:22,665 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:56:22,665 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:56:22,668 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:56:22,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:56:21" (1/3) ... [2023-12-02 15:56:22,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fd9046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:56:22, skipping insertion in model container [2023-12-02 15:56:22,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:56:22" (2/3) ... [2023-12-02 15:56:22,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fd9046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:56:22, skipping insertion in model container [2023-12-02 15:56:22,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:56:22" (3/3) ... [2023-12-02 15:56:22,670 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2023-12-02 15:56:22,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:56:22,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:56:22,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:56:22,731 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;@5c9c5069, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:56:22,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:56:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 15:56:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 15:56:22,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:56:22,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:56:22,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:56:22,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:56:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash -949832028, now seen corresponding path program 1 times [2023-12-02 15:56:22,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:56:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28723614] [2023-12-02 15:56:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:56:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:56:22,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:56:22,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28723614] [2023-12-02 15:56:22,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-02 15:56:22,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844984335] [2023-12-02 15:56:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:22,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:22,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:56:22,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:56:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:56:23,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 15:56:23,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:56:23,096 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 15:56:23,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:56:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844984335] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:56:23,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:56:23,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:56:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135735472] [2023-12-02 15:56:23,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:56:23,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 15:56:23,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:56:23,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 15:56:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 15:56:23,131 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:56:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:56:23,161 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2023-12-02 15:56:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 15:56:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-02 15:56:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:56:23,169 INFO L225 Difference]: With dead ends: 48 [2023-12-02 15:56:23,169 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 15:56:23,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 15:56:23,174 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:56:23,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 15:56:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 15:56:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 15:56:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 15:56:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-12-02 15:56:23,205 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2023-12-02 15:56:23,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:56:23,205 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-12-02 15:56:23,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:56:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-12-02 15:56:23,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 15:56:23,206 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:56:23,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:56:23,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:56:23,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:23,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:56:23,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:56:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -531894563, now seen corresponding path program 1 times [2023-12-02 15:56:23,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:56:23,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620141758] [2023-12-02 15:56:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:56:23,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:56:23,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190889984] [2023-12-02 15:56:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:23,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:23,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:56:23,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:56:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:56:23,686 WARN L260 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-02 15:56:23,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:56:23,811 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:23,812 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:23,812 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:23,825 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:23,834 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:23,835 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:23,842 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:23,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 33 [2023-12-02 15:56:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:23,930 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-12-02 15:56:23,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 37 [2023-12-02 15:56:24,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:24,008 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:24,008 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:24,014 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:24,894 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-12-02 15:56:24,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 36 [2023-12-02 15:56:24,988 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 15:56:24,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:56:24,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:56:24,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620141758] [2023-12-02 15:56:24,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:56:24,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190889984] [2023-12-02 15:56:24,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190889984] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:56:24,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:56:24,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-02 15:56:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440560399] [2023-12-02 15:56:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:56:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:56:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:56:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:56:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:56:24,992 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:56:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:56:26,113 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-12-02 15:56:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:56:26,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 15:56:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:56:26,116 INFO L225 Difference]: With dead ends: 45 [2023-12-02 15:56:26,117 INFO L226 Difference]: Without dead ends: 43 [2023-12-02 15:56:26,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-12-02 15:56:26,119 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:56:26,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:56:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-02 15:56:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-12-02 15:56:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-02 15:56:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-12-02 15:56:26,135 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 14 [2023-12-02 15:56:26,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:56:26,136 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-12-02 15:56:26,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.0) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:56:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-12-02 15:56:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 15:56:26,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:56:26,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:56:26,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 15:56:26,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:26,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:56:26,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:56:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2009014500, now seen corresponding path program 1 times [2023-12-02 15:56:26,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:56:26,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92214347] [2023-12-02 15:56:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:26,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:56:26,379 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:56:26,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711761886] [2023-12-02 15:56:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:26,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:26,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:56:26,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:56:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:56:26,546 WARN L260 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-02 15:56:26,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:56:26,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,581 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,582 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,588 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:26,597 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,602 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:26,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,609 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:26,613 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:26,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 33 [2023-12-02 15:56:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:26,680 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-12-02 15:56:26,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 37 [2023-12-02 15:56:26,951 INFO L349 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2023-12-02 15:56:26,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 50 [2023-12-02 15:56:27,486 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 15:56:27,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 37 [2023-12-02 15:56:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:56:27,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:56:42,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:56:42,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92214347] [2023-12-02 15:56:42,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:56:42,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711761886] [2023-12-02 15:56:42,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711761886] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:56:42,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454637605] [2023-12-02 15:56:42,910 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 15:56:42,910 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:56:42,914 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 15:56:42,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:56:42,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-02 15:56:42,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891315090] [2023-12-02 15:56:42,917 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:56:42,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 15:56:42,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:56:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 15:56:42,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=361, Unknown=6, NotChecked=0, Total=420 [2023-12-02 15:56:42,919 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:56:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:56:44,302 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-12-02 15:56:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 15:56:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-02 15:56:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:56:44,305 INFO L225 Difference]: With dead ends: 61 [2023-12-02 15:56:44,305 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 15:56:44,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=90, Invalid=554, Unknown=6, NotChecked=0, Total=650 [2023-12-02 15:56:44,307 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:56:44,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 123 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 15:56:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 15:56:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2023-12-02 15:56:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2023-12-02 15:56:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-12-02 15:56:44,322 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 20 [2023-12-02 15:56:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:56:44,322 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-12-02 15:56:44,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 15:56:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-12-02 15:56:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 15:56:44,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:56:44,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:56:44,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 15:56:44,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:44,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:56:44,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:56:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2094270123, now seen corresponding path program 2 times [2023-12-02 15:56:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:56:44,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508023832] [2023-12-02 15:56:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:44,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:56:44,558 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:56:44,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433385039] [2023-12-02 15:56:44,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:56:44,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:44,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:44,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:56:44,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:56:44,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 15:56:44,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:56:44,836 WARN L260 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 153 conjunts are in the unsatisfiable core [2023-12-02 15:56:44,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:56:44,872 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,873 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,873 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,878 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:44,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,885 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,885 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,890 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 33 [2023-12-02 15:56:44,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:44,934 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-12-02 15:56:44,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 37 [2023-12-02 15:56:44,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:44,974 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 15:56:45,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:45,540 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-02 15:56:45,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 53 [2023-12-02 15:56:46,120 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2023-12-02 15:56:46,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 41 [2023-12-02 15:56:46,242 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 15:56:46,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:56:50,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:56:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508023832] [2023-12-02 15:56:50,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 15:56:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433385039] [2023-12-02 15:56:50,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433385039] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:56:50,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984269298] [2023-12-02 15:56:50,010 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 15:56:50,011 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:56:50,011 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 15:56:50,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:56:50,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 15:56:50,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695717299] [2023-12-02 15:56:50,012 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 15:56:50,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:56:50,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:56:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:56:50,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=581, Unknown=1, NotChecked=0, Total=650 [2023-12-02 15:56:50,013 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:56:52,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:56:52,683 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2023-12-02 15:56:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 15:56:52,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-12-02 15:56:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:56:52,685 INFO L225 Difference]: With dead ends: 64 [2023-12-02 15:56:52,685 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 15:56:52,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=116, Invalid=939, Unknown=1, NotChecked=0, Total=1056 [2023-12-02 15:56:52,686 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:56:52,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 154 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:56:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 15:56:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2023-12-02 15:56:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-02 15:56:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2023-12-02 15:56:52,699 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 26 [2023-12-02 15:56:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:56:52,699 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2023-12-02 15:56:52,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 15:56:52,700 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2023-12-02 15:56:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:56:52,701 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:56:52,701 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:56:52,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:56:52,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:52,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:56:52,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:56:52,902 INFO L85 PathProgramCache]: Analyzing trace with hash -225753131, now seen corresponding path program 1 times [2023-12-02 15:56:52,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:56:52,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735433181] [2023-12-02 15:56:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:52,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:56:52,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 15:56:52,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154116481] [2023-12-02 15:56:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:56:52,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:56:52,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:56:52,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:56:52,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37bd9f41-8752-481f-80e5-3d228bf72a34/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:56:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:56:53,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 15:56:53,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:56:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:53,082 INFO L349 Elim1Store]: treesize reduction 40, result has 35.5 percent of original size [2023-12-02 15:56:53,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 61 [2023-12-02 15:56:53,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:53,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:53,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:53,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:56:53,197 INFO L349 Elim1Store]: treesize reduction 192, result has 27.5 percent of original size [2023-12-02 15:56:53,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 74 treesize of output 147 [2023-12-02 15:56:53,233 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 15:56:53,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2023-12-02 15:56:53,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-12-02 15:56:53,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2023-12-02 15:56:53,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-12-02 15:56:53,677 INFO L349 Elim1Store]: treesize reduction 39, result has 31.6 percent of original size [2023-12-02 15:56:53,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 118 [2023-12-02 15:56:53,748 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:56:53,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2023-12-02 15:56:55,518 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 Int)) (and (not (= v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|ULTIMATE.start_main_~#q~0#1.base| Int) (|ULTIMATE.start_main_~#q~0#1.offset| Int) (|ULTIMATE.start_main_~#r~0#1.base| Int)) (let ((.cse2 (store (store |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_1) v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 v_DerPreprocessor_2))) (let ((.cse1 (select (select .cse2 v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1) 0)) (.cse0 (select |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base|))) (and (= (store .cse0 0 .cse1) v_DerPreprocessor_2) (not (= v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 |ULTIMATE.start_main_~#r~0#1.base|)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1)) (= (select (select |c_#memory_int| v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1) 0) .cse1) (= .cse0 (select .cse2 |ULTIMATE.start_main_~#r~0#1.base|)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#q~0#1.base|) |ULTIMATE.start_main_~#q~0#1.offset|) 0) (not (= |ULTIMATE.start_main_~#q~0#1.base| |ULTIMATE.start_main_~#r~0#1.base|)) (not (= v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 |ULTIMATE.start_main_~#r~0#1.base|)))))))) (exists ((v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 Int)) (and (not (= v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|ULTIMATE.start_main_~#q~0#1.base| Int) (|ULTIMATE.start_main_~#q~0#1.offset| Int) (|ULTIMATE.start_main_~#r~0#1.base| Int)) (let ((.cse6 (store (store |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_1) v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 v_DerPreprocessor_2))) (let ((.cse4 (select (select .cse6 v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1) 0)) (.cse3 (select |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base|)) (.cse5 (select |c_#memory_int| |ULTIMATE.start_main_~#q~0#1.base|))) (and (= (store .cse3 0 .cse4) v_DerPreprocessor_2) (not (= v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 |ULTIMATE.start_main_~#r~0#1.base|)) (= (select |c_#memory_int| v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1) (store .cse5 0 .cse4)) (= .cse3 (select .cse6 |ULTIMATE.start_main_~#r~0#1.base|)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (= (select .cse5 |ULTIMATE.start_main_~#q~0#1.offset|) 0) (not (= |ULTIMATE.start_main_~#q~0#1.base| |ULTIMATE.start_main_~#r~0#1.base|)) (not (= v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 |ULTIMATE.start_main_~#r~0#1.base|)))))))) (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 Int) (|ULTIMATE.start_main_~#q~0#1.base| Int) (|ULTIMATE.start_main_~#q~0#1.offset| Int) (|ULTIMATE.start_main_~#r~0#1.base| Int)) (and (not (= v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 |ULTIMATE.start_main_~#r~0#1.base|)) (let ((.cse7 (select |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base|))) (= .cse7 (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_1) v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 (store .cse7 0 (select (select |c_#memory_int| v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1) 0))) |ULTIMATE.start_main_~#r~0#1.base|))) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#q~0#1.base|) |ULTIMATE.start_main_~#q~0#1.offset|) 0) (not (= |ULTIMATE.start_main_~#q~0#1.base| |ULTIMATE.start_main_~#r~0#1.base|)))) (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 Int) (|ULTIMATE.start_main_~#q~0#1.base| Int) (|ULTIMATE.start_main_~#q~0#1.offset| Int) (|ULTIMATE.start_main_~#r~0#1.base| Int)) (let ((.cse8 (select |c_#memory_int| |ULTIMATE.start_main_~#q~0#1.base|))) (let ((.cse9 (select .cse8 0))) (and (= (select |c_#memory_int| v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1) (store .cse8 0 .cse9)) (let ((.cse10 (select |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base|))) (= (select (store (store |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base| v_DerPreprocessor_1) v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 (store .cse10 0 .cse9)) |ULTIMATE.start_main_~#r~0#1.base|) .cse10)) (not (= v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 |ULTIMATE.start_main_~#r~0#1.base|)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (= (select .cse8 |ULTIMATE.start_main_~#q~0#1.offset|) 0) (not (= |ULTIMATE.start_main_~#q~0#1.base| |ULTIMATE.start_main_~#r~0#1.base|)))))) (exists ((v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 Int)) (and (not (= v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (exists ((v_prenex_8 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|ULTIMATE.start_main_~#r~0#1.base| Int)) (let ((.cse13 (store (store |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base| v_prenex_8) v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 v_DerPreprocessor_2))) (let ((.cse12 (select |c_#memory_int| |ULTIMATE.start_main_~#r~0#1.base|)) (.cse11 (select (select .cse13 v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1) 0))) (and (not (= v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 |ULTIMATE.start_main_~#r~0#1.base|)) (= (select (select |c_#memory_int| v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1) 0) .cse11) (= .cse12 (select .cse13 |ULTIMATE.start_main_~#r~0#1.base|)) (not (= v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 |ULTIMATE.start_main_~#r~0#1.base|)) (= v_DerPreprocessor_2 (store .cse12 0 .cse11)))))))) (exists ((v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 Int)) (and (not (= v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1 v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (= (select (select |c_#memory_int| v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1) 0) (select (select |c_#memory_int| v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1) 0)) (exists ((|ULTIMATE.start_main_~#q~0#1.base| Int) (|ULTIMATE.start_main_~#q~0#1.offset| Int)) (and (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_37_to_44_0_~b.base_BEFORE_CALL_1)) (not (= |ULTIMATE.start_main_~#q~0#1.base| v_func_to_recursive_line_37_to_44_0_~B.base_BEFORE_CALL_1)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~#q~0#1.base|) |ULTIMATE.start_main_~#q~0#1.offset|) 0)))))) is different from true [2023-12-02 15:57:12,367 WARN L293 SmtUtils]: Spent 15.29s on a formula simplification that was a NOOP. DAG size: 2049 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 15:57:12,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:57:12,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 32 select indices, 32 select index equivalence classes, 0 disjoint index pairs (out of 496 index pairs), introduced 32 new quantified variables, introduced 496 case distinctions, treesize of input 1599 treesize of output 5311