./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/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_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/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_f8c369db-69a0-49aa-863a-c9ee70b57300/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 e4b995352c2aa614292d7ca8e2ab060aead2140bac61fbd718d54a02f08e13c4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:06:26,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:06:26,775 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 20:06:26,780 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:06:26,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:06:26,806 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:06:26,807 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:06:26,807 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:06:26,808 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:06:26,808 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:06:26,809 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:06:26,810 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:06:26,810 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:06:26,811 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 20:06:26,811 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:06:26,812 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:06:26,812 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 20:06:26,813 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 20:06:26,813 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:06:26,814 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 20:06:26,814 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 20:06:26,815 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 20:06:26,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:06:26,816 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:06:26,817 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:06:26,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:06:26,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:06:26,818 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:06:26,818 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:06:26,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:06:26,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:06:26,819 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:06:26,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:06:26,820 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:06:26,820 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:06:26,820 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:06:26,821 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:06:26,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:06:26,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:06:26,821 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:06:26,821 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 20:06:26,822 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 20:06:26,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:06:26,822 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:06:26,822 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 20:06:26,822 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:06:26,823 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:06:26,823 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_f8c369db-69a0-49aa-863a-c9ee70b57300/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4b995352c2aa614292d7ca8e2ab060aead2140bac61fbd718d54a02f08e13c4 [2023-12-02 20:06:27,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:06:27,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:06:27,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:06:27,084 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:06:27,084 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:06:27,086 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c [2023-12-02 20:06:29,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:06:29,993 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:06:29,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c [2023-12-02 20:06:29,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/data/1985a33e5/bf852b245e134202aa69415dafc93331/FLAG376a634c1 [2023-12-02 20:06:30,010 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/data/1985a33e5/bf852b245e134202aa69415dafc93331 [2023-12-02 20:06:30,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:06:30,013 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:06:30,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:06:30,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:06:30,020 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:06:30,021 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd5e682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30, skipping insertion in model container [2023-12-02 20:06:30,022 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,043 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:06:30,204 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_f8c369db-69a0-49aa-863a-c9ee70b57300/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c[987,1000] [2023-12-02 20:06:30,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:06:30,227 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:06:30,236 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_f8c369db-69a0-49aa-863a-c9ee70b57300/sv-benchmarks/c/recursified_nla-digbench/recursified_ps3-ll.c[987,1000] [2023-12-02 20:06:30,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:06:30,257 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:06:30,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30 WrapperNode [2023-12-02 20:06:30,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:06:30,258 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:06:30,259 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:06:30,259 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:06:30,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,286 INFO L138 Inliner]: procedures = 16, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2023-12-02 20:06:30,287 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:06:30,288 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:06:30,288 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:06:30,288 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:06:30,296 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,306 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:06:30,312 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:06:30,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:06:30,312 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:06:30,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (1/1) ... [2023-12-02 20:06:30,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:06:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:06:30,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:06:30,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:06:30,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:06:30,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:06:30,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 20:06:30,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 20:06:30,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:06:30,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:06:30,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 20:06:30,379 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2023-12-02 20:06:30,380 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2023-12-02 20:06:30,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 20:06:30,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 20:06:30,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 20:06:30,464 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:06:30,466 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:06:30,626 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:06:30,655 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:06:30,655 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 20:06:30,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:06:30 BoogieIcfgContainer [2023-12-02 20:06:30,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:06:30,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:06:30,660 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:06:30,663 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:06:30,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:06:30" (1/3) ... [2023-12-02 20:06:30,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e656f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:06:30, skipping insertion in model container [2023-12-02 20:06:30,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:06:30" (2/3) ... [2023-12-02 20:06:30,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15e656f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:06:30, skipping insertion in model container [2023-12-02 20:06:30,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:06:30" (3/3) ... [2023-12-02 20:06:30,667 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps3-ll.c [2023-12-02 20:06:30,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:06:30,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 20:06:30,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:06:30,741 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;@ddf7923, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:06:30,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 20:06:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 20:06:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 20:06:30,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:06:30,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:06:30,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:06:30,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:06:30,759 INFO L85 PathProgramCache]: Analyzing trace with hash -248335761, now seen corresponding path program 1 times [2023-12-02 20:06:30,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:06:30,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894701460] [2023-12-02 20:06:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:06:30,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 20:06:30,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102592271] [2023-12-02 20:06:30,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:30,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:06:30,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:06:30,884 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:06:30,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 20:06:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:06:31,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 20:06:31,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:06:31,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:31,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:31,166 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 20:06:31,167 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 1 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 20:06:31,185 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 88 treesize of output 84 [2023-12-02 20:06:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:31,287 INFO L349 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2023-12-02 20:06:31,288 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 2 case distinctions, treesize of input 155 treesize of output 1 [2023-12-02 20:06:31,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:31,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:31,313 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 20:06:31,314 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 1 case distinctions, treesize of input 59 treesize of output 1 [2023-12-02 20:06:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:06:31,493 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 20:06:31,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:06:31,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:06:31,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894701460] [2023-12-02 20:06:31,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 20:06:31,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102592271] [2023-12-02 20:06:31,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102592271] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:06:31,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:06:31,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 20:06:31,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917445625] [2023-12-02 20:06:31,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:06:31,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 20:06:31,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:06:31,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 20:06:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 20:06:31,534 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 20:06:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:06:31,833 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-12-02 20:06:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 20:06:31,835 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 20:06:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:06:31,842 INFO L225 Difference]: With dead ends: 52 [2023-12-02 20:06:31,842 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 20:06:31,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:06:31,849 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:06:31,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 66 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:06:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 20:06:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-02 20:06:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 20:06:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-12-02 20:06:31,892 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 8 [2023-12-02 20:06:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:06:31,893 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-12-02 20:06:31,893 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 20:06:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-12-02 20:06:31,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:06:31,894 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:06:31,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:06:31,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:06:32,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 20:06:32,096 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:06:32,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:06:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2110697342, now seen corresponding path program 1 times [2023-12-02 20:06:32,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:06:32,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11118541] [2023-12-02 20:06:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:32,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:06:32,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 20:06:32,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925949064] [2023-12-02 20:06:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:32,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:06:32,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:06:32,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:06:32,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 20:06:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:06:32,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-02 20:06:32,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:06:32,301 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 21 treesize of output 19 [2023-12-02 20:06:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 59 treesize of output 68 [2023-12-02 20:06:32,337 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 20:06:32,364 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 38 treesize of output 36 [2023-12-02 20:06:32,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 89 [2023-12-02 20:06:32,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 93 treesize of output 76 [2023-12-02 20:06:32,402 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 140 treesize of output 132 [2023-12-02 20:06:32,410 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 1 [2023-12-02 20:06:32,459 INFO L349 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-12-02 20:06:32,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-12-02 20:06:32,490 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 20:06:32,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 1 [2023-12-02 20:06:32,513 INFO L349 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-12-02 20:06:32,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 1 [2023-12-02 20:06:32,530 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-12-02 20:06:32,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 1 [2023-12-02 20:06:32,543 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 20:06:32,544 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 23 treesize of output 19 [2023-12-02 20:06:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 94 [2023-12-02 20:06:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 81 [2023-12-02 20:06:32,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 74 [2023-12-02 20:06:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 29 [2023-12-02 20:06:32,651 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 20:06:32,659 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 20:06:32,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,679 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 20:06:32,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-12-02 20:06:32,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:32,701 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 20:06:33,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:33,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:33,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:06:33,201 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 113 treesize of output 41 [2023-12-02 20:06:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:06:33,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:06:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:06:35,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:06:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11118541] [2023-12-02 20:06:35,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 20:06:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925949064] [2023-12-02 20:06:35,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925949064] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:06:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672812288] [2023-12-02 20:06:35,328 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 20:06:35,328 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:06:35,332 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 20:06:35,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:06:35,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-02 20:06:35,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702807051] [2023-12-02 20:06:35,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 20:06:35,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 20:06:35,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:06:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 20:06:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-12-02 20:06:35,336 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:06:52,407 WARN L293 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 20:07:21,543 WARN L293 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 20:07:45,967 WARN L293 SmtUtils]: Spent 9.25s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 20:07:48,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:07:50,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:07:51,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 20:07:52,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:01,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:13,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 20:08:16,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 20:08:19,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 20:08:22,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:24,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:26,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:28,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:29,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:31,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:33,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:08:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:34,013 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2023-12-02 20:08:34,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 20:08:34,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-02 20:08:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:34,017 INFO L225 Difference]: With dead ends: 73 [2023-12-02 20:08:34,018 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 20:08:34,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 84.7s TimeCoverageRelationStatistics Valid=189, Invalid=986, Unknown=15, NotChecked=0, Total=1190 [2023-12-02 20:08:34,020 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 34 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.7s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:34,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 107 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 208 Invalid, 12 Unknown, 0 Unchecked, 35.7s Time] [2023-12-02 20:08:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 20:08:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-12-02 20:08:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 47 states have internal predecessors, (49), 12 states have call successors, (12), 9 states have call predecessors, (12), 11 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2023-12-02 20:08:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-12-02 20:08:34,044 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 18 [2023-12-02 20:08:34,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:34,045 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-12-02 20:08:34,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:08:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-12-02 20:08:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 20:08:34,045 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:34,046 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:34,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 20:08:34,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:34,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:34,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:34,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1884088945, now seen corresponding path program 1 times [2023-12-02 20:08:34,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:34,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831677278] [2023-12-02 20:08:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:34,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:34,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 20:08:34,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942999784] [2023-12-02 20:08:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:34,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:34,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:34,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 20:08:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:34,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 20:08:34,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:08:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,394 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 56 treesize of output 89 [2023-12-02 20:08:34,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-12-02 20:08:34,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,447 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 59 treesize of output 58 [2023-12-02 20:08:34,458 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 101 treesize of output 95 [2023-12-02 20:08:34,465 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 43 treesize of output 21 [2023-12-02 20:08:34,522 INFO L349 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-12-02 20:08:34,522 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 2 case distinctions, treesize of input 38 treesize of output 61 [2023-12-02 20:08:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,539 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 20:08:34,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 40 [2023-12-02 20:08:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,549 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 34 treesize of output 30 [2023-12-02 20:08:34,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 20:08:34,564 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 15 treesize of output 19 [2023-12-02 20:08:34,579 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 20:08:34,579 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 23 treesize of output 19 [2023-12-02 20:08:34,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,600 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 61 treesize of output 99 [2023-12-02 20:08:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,635 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:34,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:34,649 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:34,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:34,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,715 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 56 treesize of output 89 [2023-12-02 20:08:34,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:34,741 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 74 [2023-12-02 20:08:34,754 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:34,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:08:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:08:35,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:35,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831677278] [2023-12-02 20:08:35,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 20:08:35,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942999784] [2023-12-02 20:08:35,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942999784] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:08:35,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598188976] [2023-12-02 20:08:35,405 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 20:08:35,405 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:08:35,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:08:35,410 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:08:35,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:08:35,772 INFO L197 IcfgInterpreter]: Interpreting procedure func_to_recursive_line_26_to_34_0 with input of size 106 for LOIs [2023-12-02 20:08:36,148 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 163 for LOIs [2023-12-02 20:08:36,399 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:08:41,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1598188976] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:41,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:08:41,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 11] total 30 [2023-12-02 20:08:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029357567] [2023-12-02 20:08:41,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:41,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 20:08:41,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 20:08:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2023-12-02 20:08:41,594 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:08:43,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:43,893 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-12-02 20:08:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 20:08:43,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-02 20:08:43,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:43,895 INFO L225 Difference]: With dead ends: 69 [2023-12-02 20:08:43,895 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 20:08:43,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2023-12-02 20:08:43,897 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:43,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 20:08:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 20:08:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-02 20:08:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 43 states have internal predecessors, (44), 11 states have call successors, (11), 8 states have call predecessors, (11), 10 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-02 20:08:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-12-02 20:08:43,919 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 18 [2023-12-02 20:08:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:43,919 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-12-02 20:08:43,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.2) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 20:08:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-12-02 20:08:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 20:08:43,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:43,921 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:43,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 20:08:44,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:44,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:44,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1821742097, now seen corresponding path program 1 times [2023-12-02 20:08:44,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:44,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241541682] [2023-12-02 20:08:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:44,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:44,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 20:08:44,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360332934] [2023-12-02 20:08:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:44,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:44,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:44,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:44,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 20:08:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:44,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 114 conjunts are in the unsatisfiable core [2023-12-02 20:08:44,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:08:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:44,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:44,421 INFO L349 Elim1Store]: treesize reduction 137, result has 25.9 percent of original size [2023-12-02 20:08:44,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 217 [2023-12-02 20:08:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:44,449 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 65 treesize of output 61 [2023-12-02 20:08:44,545 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 20:08:44,595 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 20:08:44,617 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 20:08:44,635 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 20:08:44,861 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 27 [2023-12-02 20:08:45,004 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:45,007 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:45,008 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 67 [2023-12-02 20:08:45,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:45,278 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:45,278 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 67 [2023-12-02 20:08:45,376 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 79 treesize of output 49 [2023-12-02 20:08:45,469 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 154 treesize of output 122 [2023-12-02 20:08:45,475 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 24 treesize of output 27 [2023-12-02 20:08:45,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:45,553 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 57 treesize of output 47 [2023-12-02 20:08:45,559 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 89 treesize of output 59 [2023-12-02 20:08:46,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:08:46,143 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 20:08:47,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:47,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:47,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:47,838 INFO L349 Elim1Store]: treesize reduction 74, result has 32.1 percent of original size [2023-12-02 20:08:47,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 15341 treesize of output 14299 [2023-12-02 20:08:48,050 INFO L349 Elim1Store]: treesize reduction 74, result has 32.1 percent of original size [2023-12-02 20:08:48,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 686 treesize of output 664 [2023-12-02 20:08:48,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 574 treesize of output 592 [2023-12-02 20:08:48,271 INFO L349 Elim1Store]: treesize reduction 94, result has 27.1 percent of original size [2023-12-02 20:08:48,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 636 treesize of output 651 [2023-12-02 20:08:48,382 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 550 treesize of output 553 [2023-12-02 20:08:48,461 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 547 treesize of output 545 [2023-12-02 20:08:48,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 563 [2023-12-02 20:08:48,624 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 537 treesize of output 540 [2023-12-02 20:08:48,729 INFO L349 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2023-12-02 20:08:48,730 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 1 case distinctions, treesize of input 534 treesize of output 537 [2023-12-02 20:08:48,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 524 treesize of output 542 [2023-12-02 20:08:48,915 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 517 treesize of output 515 [2023-12-02 20:08:49,013 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 511 treesize of output 512 [2023-12-02 20:08:49,096 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 506 treesize of output 509 [2023-12-02 20:08:49,195 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 503 treesize of output 501 [2023-12-02 20:08:49,286 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 501 treesize of output 504 [2023-12-02 20:08:49,388 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 498 treesize of output 496 [2023-12-02 20:08:49,468 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 496 treesize of output 499 [2023-12-02 20:08:49,585 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 493 treesize of output 496 [2023-12-02 20:08:49,682 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 490 treesize of output 493 [2023-12-02 20:08:49,770 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 487 treesize of output 490 [2023-12-02 20:08:49,860 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 484 treesize of output 482 [2023-12-02 20:08:49,935 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 482 treesize of output 485 [2023-12-02 20:08:49,996 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 479 treesize of output 482 [2023-12-02 20:08:50,077 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 476 treesize of output 474 [2023-12-02 20:08:50,168 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 474 treesize of output 477 [2023-12-02 20:08:50,539 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 6 treesize of output 5 [2023-12-02 20:08:50,581 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 6 treesize of output 5 [2023-12-02 20:08:50,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:08:50,618 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 6 treesize of output 1 [2023-12-02 20:08:51,011 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 6 treesize of output 5 [2023-12-02 20:08:52,999 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:52,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,036 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:53,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,077 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:53,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,120 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:53,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,160 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:53,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,208 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:53,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,280 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:53,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,327 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:53,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,374 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 20:08:53,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 3 [2023-12-02 20:08:53,868 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 7 treesize of output 5 [2023-12-02 20:08:53,893 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 7 treesize of output 5 [2023-12-02 20:08:53,918 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 7 treesize of output 5 [2023-12-02 20:08:53,950 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 7 treesize of output 5 [2023-12-02 20:08:53,979 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 7 treesize of output 5 [2023-12-02 20:08:54,028 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 7 treesize of output 5 [2023-12-02 20:08:54,064 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 7 treesize of output 5 [2023-12-02 20:08:54,098 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 7 treesize of output 5 [2023-12-02 20:08:54,136 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 7 treesize of output 5 [2023-12-02 20:08:54,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2023-12-02 20:08:54,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2023-12-02 20:08:54,720 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 20:08:54,721 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 13 treesize of output 9 [2023-12-02 20:08:54,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2023-12-02 20:08:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 20:08:55,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:09:08,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:09:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241541682] [2023-12-02 20:09:08,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 20:09:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360332934] [2023-12-02 20:09:08,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360332934] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:09:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [927720308] [2023-12-02 20:09:08,205 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 20:09:08,205 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:09:08,205 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 20:09:08,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:09:08,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-02 20:09:08,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777992387] [2023-12-02 20:09:08,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 20:09:08,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 20:09:08,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:09:08,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 20:09:08,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=437, Unknown=3, NotChecked=0, Total=506 [2023-12-02 20:09:08,207 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 16 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 20:09:11,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:09:13,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:09:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:09:20,501 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2023-12-02 20:09:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 20:09:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-12-02 20:09:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:09:20,503 INFO L225 Difference]: With dead ends: 73 [2023-12-02 20:09:20,503 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 20:09:20,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=136, Invalid=851, Unknown=5, NotChecked=0, Total=992 [2023-12-02 20:09:20,505 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-02 20:09:20,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 50 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 3 Unknown, 0 Unchecked, 5.8s Time] [2023-12-02 20:09:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 20:09:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-02 20:09:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 11 states have call successors, (11), 8 states have call predecessors, (11), 10 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2023-12-02 20:09:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-12-02 20:09:20,525 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 30 [2023-12-02 20:09:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:09:20,526 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-12-02 20:09:20,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 20:09:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-12-02 20:09:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 20:09:20,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:09:20,527 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:09:20,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 20:09:20,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:09:20,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:09:20,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:09:20,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2029722161, now seen corresponding path program 2 times [2023-12-02 20:09:20,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:09:20,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962837236] [2023-12-02 20:09:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:09:20,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:09:20,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 20:09:20,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909523284] [2023-12-02 20:09:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:09:20,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:09:20,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:09:20,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:09:20,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 20:09:21,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:09:21,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:09:21,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 155 conjunts are in the unsatisfiable core [2023-12-02 20:09:21,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:09:21,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 20:09:21,595 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-12-02 20:09:21,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:09:21,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:09:21,652 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-12-02 20:09:21,652 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 56 treesize of output 114 [2023-12-02 20:09:21,661 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 20:09:21,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:09:21,672 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 68 treesize of output 62 [2023-12-02 20:09:21,722 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 20:09:21,755 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 20:09:21,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:09:21,770 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 20:09:21,855 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 40 treesize of output 16 [2023-12-02 20:09:23,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:09:23,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:09:23,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:09:23,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 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 167 treesize of output 123 [2023-12-02 20:09:23,130 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 182 treesize of output 133 [2023-12-02 20:09:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:09:23,356 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 20:09:23,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 231 treesize of output 197 [2023-12-02 20:09:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 20:09:23,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:10:00,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:10:00,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962837236] [2023-12-02 20:10:00,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 20:10:00,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909523284] [2023-12-02 20:10:00,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909523284] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:10:00,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [462935932] [2023-12-02 20:10:00,869 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 20:10:00,869 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:10:00,869 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$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 20:10:00,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:10:00,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 20:10:00,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461193826] [2023-12-02 20:10:00,870 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 20:10:00,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 20:10:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:10:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 20:10:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=523, Unknown=9, NotChecked=0, Total=600 [2023-12-02 20:10:00,872 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 20:10:10,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:10:12,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-02 20:10:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:10:16,054 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2023-12-02 20:10:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 20:10:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2023-12-02 20:10:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:10:16,055 INFO L225 Difference]: With dead ends: 71 [2023-12-02 20:10:16,055 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 20:10:16,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=143, Invalid=1036, Unknown=11, NotChecked=0, Total=1190 [2023-12-02 20:10:16,057 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-12-02 20:10:16,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2023-12-02 20:10:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 20:10:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-02 20:10:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2023-12-02 20:10:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-12-02 20:10:16,076 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 42 [2023-12-02 20:10:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:10:16,076 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-12-02 20:10:16,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 20:10:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-12-02 20:10:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 20:10:16,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:10:16,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-12-02 20:10:16,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 20:10:16,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:10:16,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:10:16,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:10:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1758034885, now seen corresponding path program 2 times [2023-12-02 20:10:16,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:10:16,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587111707] [2023-12-02 20:10:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:10:16,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:10:16,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 20:10:16,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356500865] [2023-12-02 20:10:16,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:10:16,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:10:16,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:10:16,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:10:16,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8c369db-69a0-49aa-863a-c9ee70b57300/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 20:19:11,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 20:19:11,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:19:11,870 WARN L260 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 244 conjunts are in the unsatisfiable core [2023-12-02 20:19:11,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:19:11,909 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-12-02 20:19:11,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 36 [2023-12-02 20:19:11,925 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 20:19:11,926 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 92 treesize of output 86 [2023-12-02 20:19:11,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:11,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:11,971 INFO L349 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2023-12-02 20:19:11,971 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 3 case distinctions, treesize of input 33 treesize of output 53 [2023-12-02 20:19:11,994 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 20:19:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:12,281 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 31 [2023-12-02 20:19:12,285 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 23 treesize of output 21 [2023-12-02 20:19:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:12,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:12,567 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 106 treesize of output 38 [2023-12-02 20:19:13,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:13,274 INFO L349 Elim1Store]: treesize reduction 604, result has 11.3 percent of original size [2023-12-02 20:19:13,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 830 treesize of output 283 [2023-12-02 20:19:13,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:13,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:13,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:13,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:13,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:13,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:13,532 INFO L349 Elim1Store]: treesize reduction 112, result has 33.7 percent of original size [2023-12-02 20:19:13,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1036 treesize of output 1050 [2023-12-02 20:19:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,361 INFO L349 Elim1Store]: treesize reduction 156, result has 23.9 percent of original size [2023-12-02 20:19:14,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 414 treesize of output 197 [2023-12-02 20:19:14,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2023-12-02 20:19:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 20:19:14,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 40 treesize of output 16 [2023-12-02 20:19:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:19:14,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:20:05,424 WARN L876 $PredicateComparison]: unable to prove that (or (let ((.cse6 (store |c_#memory_int| |c_func_to_recursive_line_26_to_34_0_#in~c.base| (let ((.cse8 (select |c_#memory_int| |c_func_to_recursive_line_26_to_34_0_#in~c.base|))) (store .cse8 |c_func_to_recursive_line_26_to_34_0_#in~c.offset| (+ (select .cse8 |c_func_to_recursive_line_26_to_34_0_#in~c.offset|) 1)))))) (let ((.cse7 (select .cse6 |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse7 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse5 (+ .cse0 1))) (let ((.cse3 (store .cse6 |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse7 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| .cse5)))) (let ((.cse4 (select .cse3 |c_func_to_recursive_line_26_to_34_0_#in~x.base|))) (let ((.cse1 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))) (= (+ 6 (* .cse0 12) (* 6 .cse1) (* 6 (* .cse0 .cse0))) (let ((.cse2 (select (select (store .cse3 |c_func_to_recursive_line_26_to_34_0_#in~x.base| (store .cse4 |c_func_to_recursive_line_26_to_34_0_#in~x.offset| (+ (* .cse5 .cse5) .cse1))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ .cse2 (* (* .cse2 .cse2) 3) (* 2 (* .cse2 .cse2 .cse2)))))))))))) (not (= (let ((.cse9 (select (select |c_#memory_int| |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ .cse9 (* (* .cse9 .cse9) 3) (* 2 (* .cse9 .cse9 .cse9)))) (* (select (select |c_#memory_int| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|) 6)))) is different from true [2023-12-02 20:21:06,041 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse18 (store |c_#memory_int| c_func_to_recursive_line_26_to_34_0_~c.base (let ((.cse20 (select |c_#memory_int| c_func_to_recursive_line_26_to_34_0_~c.base))) (store .cse20 c_func_to_recursive_line_26_to_34_0_~c.offset (+ (select .cse20 c_func_to_recursive_line_26_to_34_0_~c.offset) 1)))))) (let ((.cse19 (select .cse18 c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse1 (select .cse19 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse17 (+ .cse1 1))) (let ((.cse13 (store .cse19 c_func_to_recursive_line_26_to_34_0_~y.offset .cse17))) (let ((.cse15 (store .cse18 c_func_to_recursive_line_26_to_34_0_~y.base .cse13))) (let ((.cse16 (select .cse15 c_func_to_recursive_line_26_to_34_0_~x.base))) (let ((.cse0 (select .cse16 c_func_to_recursive_line_26_to_34_0_~x.offset))) (let ((.cse11 (store .cse16 c_func_to_recursive_line_26_to_34_0_~x.offset (+ (* .cse17 .cse17) .cse0)))) (let ((.cse3 (store .cse15 c_func_to_recursive_line_26_to_34_0_~x.base .cse11))) (or (not (= (+ 6 (* .cse0 6) (* 6 (* .cse1 .cse1)) (* .cse1 12)) (let ((.cse2 (select (select .cse3 c_func_to_recursive_line_26_to_34_0_~y.base) c_func_to_recursive_line_26_to_34_0_~y.offset))) (+ .cse2 (* (* .cse2 .cse2 .cse2) 2) (* 3 (* .cse2 .cse2)))))) (let ((.cse7 (let ((.cse14 (select .cse3 c_func_to_recursive_line_26_to_34_0_~c.base))) (store .cse14 c_func_to_recursive_line_26_to_34_0_~c.offset (+ 1 (select .cse14 c_func_to_recursive_line_26_to_34_0_~c.offset)))))) (let ((.cse12 (select (store (store (store |c_#memory_int| c_func_to_recursive_line_26_to_34_0_~y.base .cse13) c_func_to_recursive_line_26_to_34_0_~x.base .cse11) c_func_to_recursive_line_26_to_34_0_~c.base .cse7) c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse4 (select .cse12 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse10 (+ .cse4 1))) (let ((.cse8 (store .cse12 c_func_to_recursive_line_26_to_34_0_~y.offset .cse10))) (let ((.cse9 (select (store (store (store |c_#memory_int| c_func_to_recursive_line_26_to_34_0_~x.base .cse11) c_func_to_recursive_line_26_to_34_0_~c.base .cse7) c_func_to_recursive_line_26_to_34_0_~y.base .cse8) c_func_to_recursive_line_26_to_34_0_~x.base))) (let ((.cse5 (select .cse9 c_func_to_recursive_line_26_to_34_0_~x.offset))) (= (+ (* 12 .cse4) 6 (* (* .cse4 .cse4) 6) (* 6 .cse5)) (let ((.cse6 (select (select (store (store (store |c_#memory_int| c_func_to_recursive_line_26_to_34_0_~c.base .cse7) c_func_to_recursive_line_26_to_34_0_~y.base .cse8) c_func_to_recursive_line_26_to_34_0_~x.base (store .cse9 c_func_to_recursive_line_26_to_34_0_~x.offset (+ (* .cse10 .cse10) .cse5))) c_func_to_recursive_line_26_to_34_0_~y.base) c_func_to_recursive_line_26_to_34_0_~y.offset))) (+ .cse6 (* (* .cse6 .cse6) 3) (* (* .cse6 .cse6 .cse6) 2))))))))))) (not (= (+ (* 3 (* |c_func_to_recursive_line_26_to_34_0_#t~mem9| |c_func_to_recursive_line_26_to_34_0_#t~mem8|)) (* (* |c_func_to_recursive_line_26_to_34_0_#t~mem6| |c_func_to_recursive_line_26_to_34_0_#t~mem5| |c_func_to_recursive_line_26_to_34_0_#t~mem7|) 2) |c_func_to_recursive_line_26_to_34_0_#t~mem10|) (* 6 |c_func_to_recursive_line_26_to_34_0_#t~mem4|)))))))))))))) is different from true