./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ --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 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:25:03,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:25:03,555 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:25:03,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:25:03,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:25:03,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:25:03,615 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:25:03,616 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:25:03,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:25:03,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:25:03,624 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:25:03,625 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:25:03,626 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:25:03,628 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:25:03,629 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:25:03,629 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:25:03,630 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:25:03,630 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:25:03,631 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:25:03,632 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:25:03,632 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:25:03,633 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:25:03,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:25:03,635 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:25:03,636 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:25:03,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:25:03,637 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:25:03,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:25:03,638 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:25:03,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:25:03,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:25:03,641 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:25:03,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:25:03,641 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:25:03,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:25:03,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:25:03,643 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:25:03,643 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:25:03,643 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:25:03,644 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:25:03,644 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:25:03,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:25:03,645 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:25:03,645 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:25:03,646 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:25:03,646 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_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca3c96522e618238f11f200c96e0ec490e756d4e04895bd2a51f9a4ff85af1 [2023-11-19 05:25:04,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:25:04,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:25:04,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:25:04,052 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:25:04,052 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:25:04,055 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-11-19 05:25:07,208 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:25:07,472 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:25:07,473 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-11-19 05:25:07,484 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/data/569d1d4fb/ff79abd4e32e4003a81673cec296c9d4/FLAG77ce513df [2023-11-19 05:25:07,506 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/data/569d1d4fb/ff79abd4e32e4003a81673cec296c9d4 [2023-11-19 05:25:07,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:25:07,511 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:25:07,513 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:25:07,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:25:07,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:25:07,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe5cc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07, skipping insertion in model container [2023-11-19 05:25:07,521 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:25:07,735 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_4df75fdb-1b51-4b74-9399-511b66cf1bb3/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2023-11-19 05:25:07,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:25:07,775 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:25:07,793 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_4df75fdb-1b51-4b74-9399-511b66cf1bb3/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound5.c[490,503] [2023-11-19 05:25:07,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:25:07,821 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:25:07,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07 WrapperNode [2023-11-19 05:25:07,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:25:07,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:25:07,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:25:07,823 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:25:07,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,857 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2023-11-19 05:25:07,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:25:07,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:25:07,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:25:07,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:25:07,868 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,870 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,870 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,879 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,880 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,881 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,884 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:25:07,885 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:25:07,885 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:25:07,885 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:25:07,886 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (1/1) ... [2023-11-19 05:25:07,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:25:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:07,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:25:07,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:25:07,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:25:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:25:07,976 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:25:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:25:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:25:07,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:25:07,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:25:07,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:25:08,041 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:25:08,043 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:25:08,269 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:25:08,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:25:08,298 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 05:25:08,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:25:08 BoogieIcfgContainer [2023-11-19 05:25:08,303 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:25:08,306 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:25:08,306 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:25:08,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:25:08,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:25:07" (1/3) ... [2023-11-19 05:25:08,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ef6c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:25:08, skipping insertion in model container [2023-11-19 05:25:08,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:25:07" (2/3) ... [2023-11-19 05:25:08,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ef6c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:25:08, skipping insertion in model container [2023-11-19 05:25:08,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:25:08" (3/3) ... [2023-11-19 05:25:08,313 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2023-11-19 05:25:08,329 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:25:08,329 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:25:08,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:25:08,380 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;@273d2006, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:25:08,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:25:08,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 05:25:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 05:25:08,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:08,397 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:08,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:08,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1539547475, now seen corresponding path program 1 times [2023-11-19 05:25:08,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:08,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619880728] [2023-11-19 05:25:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:08,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:08,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:08,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619880728] [2023-11-19 05:25:08,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 05:25:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797054372] [2023-11-19 05:25:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:08,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:08,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:08,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:25:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:08,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 05:25:08,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:25:08,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:08,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797054372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:08,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:25:08,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:25:08,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142761006] [2023-11-19 05:25:08,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:25:08,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:25:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:25:08,811 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:25:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:08,852 INFO L93 Difference]: Finished difference Result 51 states and 79 transitions. [2023-11-19 05:25:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:25:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2023-11-19 05:25:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:08,865 INFO L225 Difference]: With dead ends: 51 [2023-11-19 05:25:08,865 INFO L226 Difference]: Without dead ends: 28 [2023-11-19 05:25:08,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:25:08,883 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:08,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:25:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-19 05:25:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-19 05:25:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 05:25:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-11-19 05:25:08,926 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 20 [2023-11-19 05:25:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:08,928 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-11-19 05:25:08,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:25:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-11-19 05:25:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 05:25:08,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:08,930 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:08,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:25:09,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:09,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:09,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1863391506, now seen corresponding path program 1 times [2023-11-19 05:25:09,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:09,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445255639] [2023-11-19 05:25:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:09,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:09,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965779649] [2023-11-19 05:25:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:09,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:09,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:09,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:09,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:25:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:09,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 05:25:09,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:25:09,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:09,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:09,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445255639] [2023-11-19 05:25:09,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:09,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965779649] [2023-11-19 05:25:09,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965779649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:09,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:25:09,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:25:09,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950574826] [2023-11-19 05:25:09,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:09,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:25:09,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:09,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:25:09,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:25:09,550 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:25:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:09,695 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2023-11-19 05:25:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:25:09,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2023-11-19 05:25:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:09,697 INFO L225 Difference]: With dead ends: 47 [2023-11-19 05:25:09,698 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 05:25:09,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:25:09,700 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:09,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 122 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:25:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 05:25:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-11-19 05:25:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 05:25:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2023-11-19 05:25:09,716 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 21 [2023-11-19 05:25:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:09,717 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2023-11-19 05:25:09,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:25:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2023-11-19 05:25:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 05:25:09,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:09,719 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:09,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:09,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:09,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:09,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1101454984, now seen corresponding path program 1 times [2023-11-19 05:25:09,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:09,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306433036] [2023-11-19 05:25:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:09,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:09,969 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:09,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244267809] [2023-11-19 05:25:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:09,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:09,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:09,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:09,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:25:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:10,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:25:10,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:25:10,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:25:10,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306433036] [2023-11-19 05:25:10,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:10,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244267809] [2023-11-19 05:25:10,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244267809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:25:10,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556452501] [2023-11-19 05:25:10,253 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-19 05:25:10,254 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:25:10,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:25:10,263 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:25:10,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:25:11,607 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 05:25:11,609 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:25:12,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1556452501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:12,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:25:12,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 7] total 18 [2023-11-19 05:25:12,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015578411] [2023-11-19 05:25:12,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:12,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 05:25:12,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 05:25:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:25:12,745 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 13 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:25:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:13,093 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2023-11-19 05:25:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 05:25:13,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2023-11-19 05:25:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:13,098 INFO L225 Difference]: With dead ends: 81 [2023-11-19 05:25:13,098 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 05:25:13,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:25:13,103 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:13,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 45 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:25:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 05:25:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2023-11-19 05:25:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 34 states have internal predecessors, (41), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 05:25:13,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-19 05:25:13,160 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 26 [2023-11-19 05:25:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:13,160 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-19 05:25:13,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:25:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-19 05:25:13,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 05:25:13,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:13,163 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:13,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:13,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:13,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash 187338980, now seen corresponding path program 1 times [2023-11-19 05:25:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:13,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523596046] [2023-11-19 05:25:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:13,401 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:13,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793874685] [2023-11-19 05:25:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:13,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:13,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:25:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:13,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 05:25:13,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:25:13,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:25:14,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:14,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523596046] [2023-11-19 05:25:14,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:14,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793874685] [2023-11-19 05:25:14,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793874685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:25:14,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [859129013] [2023-11-19 05:25:14,105 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-19 05:25:14,105 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:25:14,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:25:14,106 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:25:14,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:25:14,981 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2023-11-19 05:25:15,133 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 05:25:15,135 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:25:17,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [859129013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:17,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:25:17,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [11, 9] total 30 [2023-11-19 05:25:17,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843561704] [2023-11-19 05:25:17,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:17,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 05:25:17,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 05:25:17,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2023-11-19 05:25:17,472 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:25:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:18,166 INFO L93 Difference]: Finished difference Result 94 states and 135 transitions. [2023-11-19 05:25:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 05:25:18,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-11-19 05:25:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:18,171 INFO L225 Difference]: With dead ends: 94 [2023-11-19 05:25:18,171 INFO L226 Difference]: Without dead ends: 92 [2023-11-19 05:25:18,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2023-11-19 05:25:18,173 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:18,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 77 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:25:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-19 05:25:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2023-11-19 05:25:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 50 states have internal predecessors, (59), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-19 05:25:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 124 transitions. [2023-11-19 05:25:18,221 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 124 transitions. Word has length 29 [2023-11-19 05:25:18,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:18,222 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 124 transitions. [2023-11-19 05:25:18,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:25:18,222 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 124 transitions. [2023-11-19 05:25:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 05:25:18,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:18,230 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:18,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:18,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:18,433 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:18,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:18,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1193022788, now seen corresponding path program 1 times [2023-11-19 05:25:18,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:18,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471755776] [2023-11-19 05:25:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:18,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:18,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:18,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478278553] [2023-11-19 05:25:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:18,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:18,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:18,460 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:18,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:25:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:18,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-19 05:25:18,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 05:25:19,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:25:19,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:19,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471755776] [2023-11-19 05:25:19,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:19,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478278553] [2023-11-19 05:25:19,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478278553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:25:19,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1866210251] [2023-11-19 05:25:19,955 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-19 05:25:19,956 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:25:19,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:25:19,957 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:25:19,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:25:26,168 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-19 05:25:26,172 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 05:25:26,173 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:25:27,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1583#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:25:27,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:25:27,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:25:27,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-11-19 05:25:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195052303] [2023-11-19 05:25:27,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:25:27,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 05:25:27,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 05:25:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1409, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 05:25:27,499 INFO L87 Difference]: Start difference. First operand 85 states and 124 transitions. Second operand has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 05:25:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:33,677 INFO L93 Difference]: Finished difference Result 302 states and 465 transitions. [2023-11-19 05:25:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 05:25:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 51 [2023-11-19 05:25:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:33,684 INFO L225 Difference]: With dead ends: 302 [2023-11-19 05:25:33,685 INFO L226 Difference]: Without dead ends: 298 [2023-11-19 05:25:33,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=656, Invalid=4746, Unknown=0, NotChecked=0, Total=5402 [2023-11-19 05:25:33,690 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 209 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:33,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 399 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 05:25:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-19 05:25:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 163. [2023-11-19 05:25:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 103 states have (on average 1.2718446601941749) internal successors, (131), 105 states have internal predecessors, (131), 53 states have call successors, (53), 6 states have call predecessors, (53), 6 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-19 05:25:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 236 transitions. [2023-11-19 05:25:33,848 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 236 transitions. Word has length 51 [2023-11-19 05:25:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:33,849 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 236 transitions. [2023-11-19 05:25:33,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-19 05:25:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 236 transitions. [2023-11-19 05:25:33,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:25:33,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:33,853 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:33,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:34,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:34,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:34,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash 852275598, now seen corresponding path program 1 times [2023-11-19 05:25:34,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:34,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45428708] [2023-11-19 05:25:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:34,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:34,085 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:34,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976144117] [2023-11-19 05:25:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:34,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:34,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:34,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:34,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:25:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:34,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:25:34,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-19 05:25:34,201 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:25:34,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45428708] [2023-11-19 05:25:34,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976144117] [2023-11-19 05:25:34,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976144117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:25:34,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:25:34,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:25:34,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019027710] [2023-11-19 05:25:34,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:34,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:25:34,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:34,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:25:34,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:25:34,206 INFO L87 Difference]: Start difference. First operand 163 states and 236 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:25:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:34,382 INFO L93 Difference]: Finished difference Result 275 states and 402 transitions. [2023-11-19 05:25:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:25:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2023-11-19 05:25:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:34,386 INFO L225 Difference]: With dead ends: 275 [2023-11-19 05:25:34,386 INFO L226 Difference]: Without dead ends: 188 [2023-11-19 05:25:34,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:25:34,389 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:34,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:25:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-19 05:25:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 176. [2023-11-19 05:25:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 105 states have internal predecessors, (131), 65 states have call successors, (65), 6 states have call predecessors, (65), 6 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-19 05:25:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 260 transitions. [2023-11-19 05:25:34,518 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 260 transitions. Word has length 59 [2023-11-19 05:25:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 260 transitions. [2023-11-19 05:25:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:25:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 260 transitions. [2023-11-19 05:25:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:25:34,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:34,522 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:34,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:34,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:25:34,727 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:34,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1568094960, now seen corresponding path program 1 times [2023-11-19 05:25:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:34,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461769558] [2023-11-19 05:25:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:34,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:34,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:34,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977129297] [2023-11-19 05:25:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:34,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:34,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:34,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:34,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:25:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:34,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 05:25:34,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-19 05:25:35,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 05:25:36,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461769558] [2023-11-19 05:25:36,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977129297] [2023-11-19 05:25:36,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977129297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:25:36,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [190079297] [2023-11-19 05:25:36,259 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-19 05:25:36,259 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:25:36,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:25:36,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:25:36,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:25:41,433 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-19 05:25:41,441 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 05:25:41,443 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:25:42,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3671#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:25:42,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:25:42,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:25:42,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-11-19 05:25:42,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479273619] [2023-11-19 05:25:42,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:25:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 05:25:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 05:25:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2023-11-19 05:25:42,644 INFO L87 Difference]: Start difference. First operand 176 states and 260 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-19 05:25:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:49,781 INFO L93 Difference]: Finished difference Result 301 states and 445 transitions. [2023-11-19 05:25:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 05:25:49,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 59 [2023-11-19 05:25:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:49,785 INFO L225 Difference]: With dead ends: 301 [2023-11-19 05:25:49,785 INFO L226 Difference]: Without dead ends: 299 [2023-11-19 05:25:49,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=529, Invalid=3377, Unknown=0, NotChecked=0, Total=3906 [2023-11-19 05:25:49,789 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:49,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 394 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 05:25:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-19 05:25:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 263. [2023-11-19 05:25:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 157 states have (on average 1.267515923566879) internal successors, (199), 158 states have internal predecessors, (199), 97 states have call successors, (97), 8 states have call predecessors, (97), 8 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-19 05:25:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 392 transitions. [2023-11-19 05:25:50,092 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 392 transitions. Word has length 59 [2023-11-19 05:25:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:50,093 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 392 transitions. [2023-11-19 05:25:50,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-19 05:25:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 392 transitions. [2023-11-19 05:25:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 05:25:50,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:50,103 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:50,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:50,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 05:25:50,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:50,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:50,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1047855047, now seen corresponding path program 1 times [2023-11-19 05:25:50,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:50,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667422844] [2023-11-19 05:25:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:50,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:50,338 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:50,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706861784] [2023-11-19 05:25:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:50,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:50,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:50,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:50,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:25:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:25:50,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:25:50,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-19 05:25:50,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-19 05:25:50,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667422844] [2023-11-19 05:25:50,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706861784] [2023-11-19 05:25:50,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706861784] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:50,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:50,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 05:25:50,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97421767] [2023-11-19 05:25:50,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:25:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:25:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:25:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:25:50,571 INFO L87 Difference]: Start difference. First operand 263 states and 392 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:25:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:50,799 INFO L93 Difference]: Finished difference Result 277 states and 403 transitions. [2023-11-19 05:25:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:25:50,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2023-11-19 05:25:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:50,802 INFO L225 Difference]: With dead ends: 277 [2023-11-19 05:25:50,802 INFO L226 Difference]: Without dead ends: 275 [2023-11-19 05:25:50,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:25:50,804 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:50,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 107 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:25:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-19 05:25:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2023-11-19 05:25:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 167 states have internal predecessors, (208), 97 states have call successors, (97), 11 states have call predecessors, (97), 11 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-19 05:25:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 401 transitions. [2023-11-19 05:25:51,068 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 401 transitions. Word has length 61 [2023-11-19 05:25:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:51,068 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 401 transitions. [2023-11-19 05:25:51,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:25:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 401 transitions. [2023-11-19 05:25:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:25:51,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:51,070 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:51,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 05:25:51,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:51,277 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:51,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:51,277 INFO L85 PathProgramCache]: Analyzing trace with hash -94425734, now seen corresponding path program 2 times [2023-11-19 05:25:51,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:51,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844788272] [2023-11-19 05:25:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:51,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:51,300 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723625758] [2023-11-19 05:25:51,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:25:51,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:51,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:51,317 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:51,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:25:51,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:25:51,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:25:51,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 05:25:51,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 05:25:51,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:51,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:51,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844788272] [2023-11-19 05:25:51,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:51,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723625758] [2023-11-19 05:25:51,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723625758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:25:51,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024022237] [2023-11-19 05:25:51,715 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-19 05:25:51,716 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:25:51,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:25:51,716 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:25:51,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:25:56,069 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-11-19 05:25:56,074 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 05:25:56,076 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:25:56,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6110#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:25:56,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:25:56,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:25:56,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-19 05:25:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427742782] [2023-11-19 05:25:56,689 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 05:25:56,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:25:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:25:56,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:25:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-11-19 05:25:56,691 INFO L87 Difference]: Start difference. First operand 275 states and 401 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:25:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:25:57,155 INFO L93 Difference]: Finished difference Result 381 states and 555 transitions. [2023-11-19 05:25:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:25:57,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2023-11-19 05:25:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:25:57,159 INFO L225 Difference]: With dead ends: 381 [2023-11-19 05:25:57,159 INFO L226 Difference]: Without dead ends: 379 [2023-11-19 05:25:57,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-11-19 05:25:57,161 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:25:57,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 202 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:25:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-19 05:25:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 369. [2023-11-19 05:25:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 221 states have (on average 1.257918552036199) internal successors, (278), 222 states have internal predecessors, (278), 133 states have call successors, (133), 14 states have call predecessors, (133), 14 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-19 05:25:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 543 transitions. [2023-11-19 05:25:57,436 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 543 transitions. Word has length 59 [2023-11-19 05:25:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:25:57,436 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 543 transitions. [2023-11-19 05:25:57,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:25:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 543 transitions. [2023-11-19 05:25:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:25:57,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:25:57,438 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:25:57,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:25:57,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:57,653 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:25:57,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:25:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1223812978, now seen corresponding path program 3 times [2023-11-19 05:25:57,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:25:57,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12561030] [2023-11-19 05:25:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:25:57,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:25:57,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:25:57,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997199737] [2023-11-19 05:25:57,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:25:57,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:25:57,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:25:57,690 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:25:57,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4df75fdb-1b51-4b74-9399-511b66cf1bb3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:25:57,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:25:57,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:25:57,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:25:57,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:25:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:25:57,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:25:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:25:57,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:25:57,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12561030] [2023-11-19 05:25:57,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:25:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997199737] [2023-11-19 05:25:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997199737] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:25:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771827677] [2023-11-19 05:25:57,895 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-19 05:25:57,896 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:25:57,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:25:57,896 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:25:57,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs