./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/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_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/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_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/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 ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:50:31,110 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:50:31,176 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 14:50:31,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:50:31,181 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:50:31,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:50:31,206 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:50:31,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:50:31,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:50:31,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:50:31,209 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:50:31,209 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:50:31,210 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:50:31,210 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:50:31,211 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:50:31,211 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:50:31,212 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:50:31,212 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:50:31,212 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:50:31,213 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:50:31,213 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:50:31,214 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:50:31,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:50:31,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:50:31,216 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:50:31,216 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:50:31,217 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:50:31,217 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:50:31,217 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:50:31,218 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:50:31,218 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:50:31,218 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:50:31,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:50:31,219 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:50:31,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:50:31,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:50:31,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:50:31,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:50:31,230 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:50:31,230 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:50:31,231 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:50:31,231 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:50:31,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:50:31,231 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:50:31,232 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:50:31,232 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:50:31,232 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:50:31,232 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_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac02a57e98f6481647f49b84c91fda6d0505e35fbffb37ed6b508f20e911a1af [2023-12-02 14:50:31,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:50:31,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:50:31,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:50:31,478 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:50:31,479 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:50:31,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-12-02 14:50:34,238 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:50:34,398 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:50:34,399 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c [2023-12-02 14:50:34,407 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/data/8abdd26ac/d61b9611148e4e33b9bbaf47f1449e69/FLAG83329dbfb [2023-12-02 14:50:34,422 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/data/8abdd26ac/d61b9611148e4e33b9bbaf47f1449e69 [2023-12-02 14:50:34,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:50:34,426 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:50:34,427 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:50:34,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:50:34,433 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:50:34,434 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f533beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34, skipping insertion in model container [2023-12-02 14:50:34,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,460 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:50:34,612 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_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-12-02 14:50:34,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:50:34,641 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:50:34,653 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_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/sv-benchmarks/c/recursified_nla-digbench/recursified_sqrt1-ll.c[1052,1065] [2023-12-02 14:50:34,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:50:34,679 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:50:34,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34 WrapperNode [2023-12-02 14:50:34,680 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:50:34,681 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:50:34,681 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:50:34,681 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:50:34,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,697 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,717 INFO L138 Inliner]: procedures = 16, calls = 58, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-12-02 14:50:34,718 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:50:34,719 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:50:34,719 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:50:34,719 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:50:34,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,732 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,732 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,738 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,746 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:50:34,747 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:50:34,747 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:50:34,747 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:50:34,748 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (1/1) ... [2023-12-02 14:50:34,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:50:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:34,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:50:34,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:50:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:50:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:50:34,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:50:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:50:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_40_0 [2023-12-02 14:50:34,818 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_40_0 [2023-12-02 14:50:34,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:50:34,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:50:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:50:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 14:50:34,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 14:50:34,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:50:34,906 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:50:34,909 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:50:35,091 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:50:35,115 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:50:35,115 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 14:50:35,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:50:35 BoogieIcfgContainer [2023-12-02 14:50:35,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:50:35,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:50:35,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:50:35,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:50:35,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:50:34" (1/3) ... [2023-12-02 14:50:35,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715e3790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:50:35, skipping insertion in model container [2023-12-02 14:50:35,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:50:34" (2/3) ... [2023-12-02 14:50:35,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@715e3790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:50:35, skipping insertion in model container [2023-12-02 14:50:35,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:50:35" (3/3) ... [2023-12-02 14:50:35,126 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_sqrt1-ll.c [2023-12-02 14:50:35,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:50:35,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:50:35,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:50:35,194 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;@14e9a5ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:50:35,194 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:50:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 14:50:35,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 14:50:35,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:35,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:35,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:35,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1408384077, now seen corresponding path program 1 times [2023-12-02 14:50:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:50:35,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743831060] [2023-12-02 14:50:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:50:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:36,014 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 14:50:36,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:50:36,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743831060] [2023-12-02 14:50:36,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743831060] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:36,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:36,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:50:36,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033324459] [2023-12-02 14:50:36,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:36,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:50:36,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:50:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:50:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:50:36,054 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:50:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:36,392 INFO L93 Difference]: Finished difference Result 76 states and 113 transitions. [2023-12-02 14:50:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:50:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 14:50:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:36,403 INFO L225 Difference]: With dead ends: 76 [2023-12-02 14:50:36,403 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 14:50:36,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:50:36,410 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:36,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:50:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 14:50:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-12-02 14:50:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 14:50:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-12-02 14:50:36,455 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 8 [2023-12-02 14:50:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:36,455 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-12-02 14:50:36,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:50:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-12-02 14:50:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 14:50:36,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:36,457 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:36,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:50:36,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:36,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:36,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1735781632, now seen corresponding path program 1 times [2023-12-02 14:50:36,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:50:36,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923625301] [2023-12-02 14:50:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:36,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:50:36,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:50:36,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344732966] [2023-12-02 14:50:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:36,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:36,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:36,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:50:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:36,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 14:50:36,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:36,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 55 [2023-12-02 14:50:36,713 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:50:36,714 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 76 treesize of output 70 [2023-12-02 14:50:36,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 82 [2023-12-02 14:50:36,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 67 [2023-12-02 14:50:36,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,791 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:36,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 64 [2023-12-02 14:50:36,814 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 8 treesize of output 7 [2023-12-02 14:50:36,829 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 17 treesize of output 15 [2023-12-02 14:50:36,844 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 8 treesize of output 7 [2023-12-02 14:50:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:36,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 21 [2023-12-02 14:50:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:50:37,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:50:37,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:50:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923625301] [2023-12-02 14:50:37,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:50:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344732966] [2023-12-02 14:50:37,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344732966] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:37,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:50:37,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2023-12-02 14:50:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551839965] [2023-12-02 14:50:37,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:37,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:50:37,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:50:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:50:37,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-02 14:50:37,455 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 14:50:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:37,726 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-12-02 14:50:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:50:37,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 14:50:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:37,728 INFO L225 Difference]: With dead ends: 53 [2023-12-02 14:50:37,728 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 14:50:37,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-12-02 14:50:37,730 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:37,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 109 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:50:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 14:50:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-12-02 14:50:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 14:50:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-12-02 14:50:37,744 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 14 [2023-12-02 14:50:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:37,745 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-12-02 14:50:37,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 14:50:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-12-02 14:50:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:50:37,746 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:37,746 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:37,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:37,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 14:50:37,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:37,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1054740085, now seen corresponding path program 1 times [2023-12-02 14:50:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:50:37,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896514767] [2023-12-02 14:50:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:50:37,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:50:37,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596312507] [2023-12-02 14:50:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:37,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:37,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:37,974 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:37,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:50:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:38,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 14:50:38,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:38,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 104 [2023-12-02 14:50:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 49 treesize of output 40 [2023-12-02 14:50:38,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2023-12-02 14:50:38,195 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 8 treesize of output 1 [2023-12-02 14:50:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 55 [2023-12-02 14:50:38,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 14:50:38,258 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 8 treesize of output 1 [2023-12-02 14:50:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 114 [2023-12-02 14:50:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 14:50:38,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2023-12-02 14:50:38,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 14:50:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,458 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 24 treesize of output 17 [2023-12-02 14:50:38,462 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 8 treesize of output 7 [2023-12-02 14:50:38,471 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 8 treesize of output 7 [2023-12-02 14:50:38,503 INFO L349 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2023-12-02 14:50:38,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 49 [2023-12-02 14:50:38,510 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 8 treesize of output 7 [2023-12-02 14:50:38,519 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-12-02 14:50:38,530 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:38,547 INFO L349 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2023-12-02 14:50:38,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 41 [2023-12-02 14:50:38,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:38,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 17 [2023-12-02 14:50:38,561 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 8 treesize of output 7 [2023-12-02 14:50:38,568 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 51 [2023-12-02 14:50:38,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-12-02 14:50:38,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 14:50:38,605 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 8 treesize of output 7 [2023-12-02 14:50:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:50:38,628 INFO L349 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-12-02 14:50:38,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 84 [2023-12-02 14:50:38,640 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 42 [2023-12-02 14:50:38,649 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 34 treesize of output 32 [2023-12-02 14:50:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 14:50:38,686 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:38,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 98 [2023-12-02 14:50:38,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,707 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:38,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 43 [2023-12-02 14:50:38,734 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 14:50:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:50:39,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:50:39,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:50:39,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896514767] [2023-12-02 14:50:39,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:50:39,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596312507] [2023-12-02 14:50:39,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596312507] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:39,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:50:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-12-02 14:50:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313853081] [2023-12-02 14:50:39,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:39,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:50:39,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:50:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:50:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:50:39,323 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:50:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:40,059 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-12-02 14:50:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:50:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-02 14:50:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:40,061 INFO L225 Difference]: With dead ends: 57 [2023-12-02 14:50:40,061 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 14:50:40,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-12-02 14:50:40,063 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:40,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 109 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:50:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 14:50:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2023-12-02 14:50:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 14:50:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-12-02 14:50:40,077 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 20 [2023-12-02 14:50:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:40,078 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-12-02 14:50:40,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 14:50:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-12-02 14:50:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:50:40,079 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:40,079 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:40,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:50:40,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 14:50:40,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:40,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1398908834, now seen corresponding path program 1 times [2023-12-02 14:50:40,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:50:40,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036849228] [2023-12-02 14:50:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:40,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:50:40,301 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:50:40,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554387819] [2023-12-02 14:50:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:40,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:40,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:40,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:40,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:50:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:40,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-02 14:50:40,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:40,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:40,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:40,493 INFO L349 Elim1Store]: treesize reduction 84, result has 27.0 percent of original size [2023-12-02 14:50:40,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 106 [2023-12-02 14:50:40,513 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:50:40,513 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 384 treesize of output 372 [2023-12-02 14:50:40,537 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 8 treesize of output 7 [2023-12-02 14:50:40,611 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 8 treesize of output 7 [2023-12-02 14:50:40,623 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 8 treesize of output 7 [2023-12-02 14:50:40,636 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 8 treesize of output 7 [2023-12-02 14:50:40,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 68 [2023-12-02 14:50:41,286 INFO L349 Elim1Store]: treesize reduction 127, result has 19.1 percent of original size [2023-12-02 14:50:41,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 94 [2023-12-02 14:50:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:41,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:41,326 INFO L349 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2023-12-02 14:50:41,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 93 [2023-12-02 14:50:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:41,342 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:41,363 INFO L349 Elim1Store]: treesize reduction 60, result has 13.0 percent of original size [2023-12-02 14:50:41,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 78 [2023-12-02 14:50:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:50:42,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:42,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:50:42,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036849228] [2023-12-02 14:50:42,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:50:42,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554387819] [2023-12-02 14:50:42,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554387819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:42,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821584909] [2023-12-02 14:50:42,355 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 14:50:42,355 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:50:42,359 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 14:50:42,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:50:42,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-02 14:50:42,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426490010] [2023-12-02 14:50:42,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:50:42,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 14:50:42,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:50:42,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 14:50:42,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=395, Unknown=5, NotChecked=0, Total=462 [2023-12-02 14:50:42,364 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:50:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:43,766 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2023-12-02 14:50:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 14:50:43,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-12-02 14:50:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:43,769 INFO L225 Difference]: With dead ends: 91 [2023-12-02 14:50:43,769 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 14:50:43,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=175, Invalid=1079, Unknown=6, NotChecked=0, Total=1260 [2023-12-02 14:50:43,770 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:43,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 117 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 353 Invalid, 3 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:50:43,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 14:50:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2023-12-02 14:50:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2023-12-02 14:50:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2023-12-02 14:50:43,787 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 30 [2023-12-02 14:50:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:43,787 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2023-12-02 14:50:43,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:50:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2023-12-02 14:50:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:50:43,789 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:43,789 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:43,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:50:43,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-02 14:50:43,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:43,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1438102184, now seen corresponding path program 1 times [2023-12-02 14:50:43,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:50:43,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035827345] [2023-12-02 14:50:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:43,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:50:44,004 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:50:44,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680873464] [2023-12-02 14:50:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:44,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:44,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:44,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:44,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:50:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:44,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 14:50:44,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 57 [2023-12-02 14:50:44,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 14:50:44,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2023-12-02 14:50:44,147 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 8 treesize of output 7 [2023-12-02 14:50:44,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 14:50:44,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 50 [2023-12-02 14:50:44,184 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 14:50:44,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 55 [2023-12-02 14:50:44,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,252 INFO L349 Elim1Store]: treesize reduction 63, result has 4.5 percent of original size [2023-12-02 14:50:44,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 94 [2023-12-02 14:50:44,264 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 31 [2023-12-02 14:50:44,310 INFO L349 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2023-12-02 14:50:44,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 31 [2023-12-02 14:50:44,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,344 INFO L349 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-12-02 14:50:44,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 14:50:44,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,359 INFO L349 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-12-02 14:50:44,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 14:50:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,376 INFO L349 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-12-02 14:50:44,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 14:50:44,383 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,385 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 21 [2023-12-02 14:50:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,400 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 14:50:44,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:50:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,409 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 14:50:44,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:50:44,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,417 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 14:50:44,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:50:44,421 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 50 [2023-12-02 14:50:44,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2023-12-02 14:50:44,448 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 8 treesize of output 7 [2023-12-02 14:50:44,454 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 8 treesize of output 7 [2023-12-02 14:50:44,459 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-12-02 14:50:44,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 14:50:44,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2023-12-02 14:50:44,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 15 [2023-12-02 14:50:44,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 15 [2023-12-02 14:50:44,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,545 INFO L349 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2023-12-02 14:50:44,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 51 [2023-12-02 14:50:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2023-12-02 14:50:44,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,581 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 36 treesize of output 14 [2023-12-02 14:50:44,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 14:50:44,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-12-02 14:50:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:50:44,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 45 [2023-12-02 14:50:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-02 14:50:44,648 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 8 treesize of output 1 [2023-12-02 14:50:44,667 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 8 treesize of output 7 [2023-12-02 14:50:44,690 INFO L349 Elim1Store]: treesize reduction 63, result has 4.5 percent of original size [2023-12-02 14:50:44,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 94 [2023-12-02 14:50:44,703 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,706 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 31 [2023-12-02 14:50:44,743 INFO L349 Elim1Store]: treesize reduction 30, result has 31.8 percent of original size [2023-12-02 14:50:44,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 31 [2023-12-02 14:50:44,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,778 INFO L349 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-12-02 14:50:44,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 14:50:44,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,794 INFO L349 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-12-02 14:50:44,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 14:50:44,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,810 INFO L349 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2023-12-02 14:50:44,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 14:50:44,817 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 21 [2023-12-02 14:50:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,836 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 14:50:44,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:50:44,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,846 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 14:50:44,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:50:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:44,856 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 14:50:44,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:50:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 14:50:44,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:45,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:50:45,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035827345] [2023-12-02 14:50:45,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:50:45,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680873464] [2023-12-02 14:50:45,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680873464] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:45,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616154927] [2023-12-02 14:50:45,173 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 14:50:45,173 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:50:45,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:50:45,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:50:45,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:50:45,878 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_29_to_40_0 with input of size 107 for LOIs [2023-12-02 14:50:46,701 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-12-02 14:50:46,705 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:50:50,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1254#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 14:50:50,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:50:50,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:50:50,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-02 14:50:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723296126] [2023-12-02 14:50:50,847 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:50:50,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:50:50,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:50:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:50:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-12-02 14:50:50,849 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:50:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:51,028 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2023-12-02 14:50:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:50:51,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-12-02 14:50:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:51,030 INFO L225 Difference]: With dead ends: 95 [2023-12-02 14:50:51,030 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 14:50:51,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-12-02 14:50:51,031 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:51,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 53 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:50:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 14:50:51,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-12-02 14:50:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.103448275862069) internal successors, (64), 61 states have internal predecessors, (64), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (22), 20 states have call predecessors, (22), 18 states have call successors, (22) [2023-12-02 14:50:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2023-12-02 14:50:51,047 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 30 [2023-12-02 14:50:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:51,047 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2023-12-02 14:50:51,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:50:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2023-12-02 14:50:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 14:50:51,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:51,048 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:51,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:51,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:51,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:50:51,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:51,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1912282705, now seen corresponding path program 2 times [2023-12-02 14:50:51,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:50:51,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498619984] [2023-12-02 14:50:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:51,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:50:51,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:50:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682146102] [2023-12-02 14:50:51,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:50:51,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:51,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:51,294 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:51,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3b4e04b-9fc3-49f9-a2c7-4d3863d641c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:50:51,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 14:50:51,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:50:51,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 89 conjunts are in the unsatisfiable core [2023-12-02 14:50:51,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:51,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:51,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:51,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:51,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:52,207 INFO L349 Elim1Store]: treesize reduction 384, result has 24.0 percent of original size [2023-12-02 14:50:52,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 8 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 11 new quantified variables, introduced 8 case distinctions, treesize of input 286 treesize of output 1051 [2023-12-02 14:50:52,328 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 33 treesize of output 29 [2023-12-02 14:50:52,440 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 33 treesize of output 29 [2023-12-02 14:50:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:52,586 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:50:52,587 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 45 treesize of output 41 [2023-12-02 14:50:52,731 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 33 treesize of output 29 [2023-12-02 14:50:53,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 99 [2023-12-02 14:50:53,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 99 [2023-12-02 14:50:54,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 99 [2023-12-02 14:50:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:56,332 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,446 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:56,464 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:56,509 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,565 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,590 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:56,590 INFO L224 Elim1Store]: Index analysis took 263 ms [2023-12-02 14:50:56,604 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-12-02 14:50:56,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 13 case distinctions, treesize of input 479 treesize of output 678 [2023-12-02 14:50:56,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:56,975 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,124 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:57,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:57,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:57,176 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:57,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:57,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:57,202 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,215 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,218 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,234 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,293 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:57,300 INFO L224 Elim1Store]: Index analysis took 330 ms [2023-12-02 14:50:57,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 482 treesize of output 681 [2023-12-02 14:50:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,367 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,377 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,396 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,444 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,449 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,458 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,458 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,464 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,478 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:58,486 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,489 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,490 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:50:58,490 INFO L224 Elim1Store]: Index analysis took 136 ms [2023-12-02 14:50:58,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 369 [2023-12-02 14:51:08,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:51:08,585 INFO L349 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2023-12-02 14:51:08,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 19274 treesize of output 19029 [2023-12-02 14:51:52,529 WARN L293 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 487 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:52:59,294 WARN L293 SmtUtils]: Spent 26.20s on a formula simplification that was a NOOP. DAG size: 638 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 14:53:01,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:57:17,217 WARN L293 SmtUtils]: Spent 4.24m on a formula simplification. DAG size of input: 12556 DAG size of output: 687 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 14:57:17,217 INFO L349 Elim1Store]: treesize reduction 24733, result has 4.9 percent of original size [2023-12-02 14:57:17,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 78 select indices, 78 select index equivalence classes, 1 disjoint index pairs (out of 3003 index pairs), introduced 82 new quantified variables, introduced 3079 case distinctions, treesize of input 85001 treesize of output 84760 [2023-12-02 14:57:18,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1057 treesize of output 1055 [2023-12-02 14:57:19,073 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 1055 treesize of output 1056 [2023-12-02 14:57:19,463 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 1050 treesize of output 1051 [2023-12-02 14:57:19,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1045 treesize of output 1041 [2023-12-02 14:57:30,175 INFO L224 Elim1Store]: Index analysis took 9581 ms [2023-12-02 15:01:15,051 WARN L293 SmtUtils]: Spent 3.75m on a formula simplification. DAG size of input: 12937 DAG size of output: 684 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 15:01:15,052 INFO L349 Elim1Store]: treesize reduction 26688, result has 4.6 percent of original size [2023-12-02 15:01:15,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 78 select indices, 78 select index equivalence classes, 1 disjoint index pairs (out of 3003 index pairs), introduced 82 new quantified variables, introduced 3154 case distinctions, treesize of input 1970 treesize of output 2988 [2023-12-02 15:01:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:01:31,168 INFO L224 Elim1Store]: Index analysis took 13532 ms