./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-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_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/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_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/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_4115c033-1254-4800-808c-16889b285e90/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 a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:01:45,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:01:45,640 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:01:45,646 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:01:45,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:01:45,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:01:45,683 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:01:45,684 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:01:45,685 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:01:45,685 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:01:45,686 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:01:45,687 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:01:45,687 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:01:45,688 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:01:45,688 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:01:45,689 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:01:45,689 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:01:45,690 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:01:45,691 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:01:45,691 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:01:45,692 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:01:45,692 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:01:45,693 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:01:45,693 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:01:45,694 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:01:45,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:01:45,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:01:45,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:01:45,696 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:01:45,696 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:01:45,697 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:01:45,697 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:01:45,697 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:01:45,698 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:01:45,698 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:01:45,698 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:01:45,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:01:45,699 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:01:45,699 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:01:45,699 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:01:45,700 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:01:45,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:01:45,700 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:01:45,701 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:01:45,701 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:01:45,701 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_4115c033-1254-4800-808c-16889b285e90/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 [2023-11-19 05:01:45,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:01:45,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:01:45,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:01:46,000 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:01:46,000 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:01:46,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2023-11-19 05:01:49,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:01:49,449 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:01:49,450 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2023-11-19 05:01:49,458 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/data/53857a4d5/39ca527e218647f19c9c9553b28a91aa/FLAGc59599ae6 [2023-11-19 05:01:49,471 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/data/53857a4d5/39ca527e218647f19c9c9553b28a91aa [2023-11-19 05:01:49,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:01:49,476 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:01:49,477 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:01:49,477 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:01:49,483 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:01:49,484 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,485 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b93f82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49, skipping insertion in model container [2023-11-19 05:01:49,485 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,517 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:01:49,677 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_4115c033-1254-4800-808c-16889b285e90/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2023-11-19 05:01:49,704 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:01:49,714 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:01:49,726 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_4115c033-1254-4800-808c-16889b285e90/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2023-11-19 05:01:49,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:01:49,750 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:01:49,751 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49 WrapperNode [2023-11-19 05:01:49,751 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:01:49,752 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:01:49,752 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:01:49,753 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:01:49,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,766 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,788 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-11-19 05:01:49,789 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:01:49,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:01:49,790 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:01:49,790 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:01:49,799 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,801 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,802 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,806 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,810 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:01:49,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:01:49,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:01:49,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:01:49,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (1/1) ... [2023-11-19 05:01:49,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:01:49,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:49,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:01:49,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:01:49,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:01:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:01:49,902 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:01:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:01:49,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:01:49,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:01:49,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:01:49,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:01:49,982 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:01:49,984 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:01:50,339 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:01:50,377 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:01:50,377 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:01:50,382 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:01:50 BoogieIcfgContainer [2023-11-19 05:01:50,382 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:01:50,385 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:01:50,386 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:01:50,389 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:01:50,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:01:49" (1/3) ... [2023-11-19 05:01:50,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29615afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:01:50, skipping insertion in model container [2023-11-19 05:01:50,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:49" (2/3) ... [2023-11-19 05:01:50,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29615afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:01:50, skipping insertion in model container [2023-11-19 05:01:50,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:01:50" (3/3) ... [2023-11-19 05:01:50,392 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2023-11-19 05:01:50,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:01:50,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:01:50,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:01:50,475 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;@6a224935, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:01:50,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:01:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 05:01:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:01:50,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:50,488 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:50,489 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:50,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 763440750, now seen corresponding path program 1 times [2023-11-19 05:01:50,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:50,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95603454] [2023-11-19 05:01:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:01:50,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:50,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95603454] [2023-11-19 05:01:50,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95603454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:50,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:50,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:01:50,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975555418] [2023-11-19 05:01:50,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:50,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:50,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:50,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:50,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:50,964 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:01:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:51,086 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2023-11-19 05:01:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:01:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-11-19 05:01:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:51,098 INFO L225 Difference]: With dead ends: 57 [2023-11-19 05:01:51,098 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 05:01:51,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:51,109 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:51,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 05:01:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2023-11-19 05:01:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 05:01:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-11-19 05:01:51,156 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 17 [2023-11-19 05:01:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:51,157 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-11-19 05:01:51,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:01:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-11-19 05:01:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:01:51,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:51,160 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:51,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:01:51,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:51,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:51,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1804559349, now seen corresponding path program 1 times [2023-11-19 05:01:51,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:51,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630206056] [2023-11-19 05:01:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:51,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:01:51,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630206056] [2023-11-19 05:01:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630206056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:51,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:51,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:01:51,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824497307] [2023-11-19 05:01:51,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:51,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:51,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:51,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:51,325 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:01:51,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:51,443 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2023-11-19 05:01:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:01:51,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2023-11-19 05:01:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:51,446 INFO L225 Difference]: With dead ends: 41 [2023-11-19 05:01:51,446 INFO L226 Difference]: Without dead ends: 39 [2023-11-19 05:01:51,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:51,448 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:51,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 98 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-19 05:01:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2023-11-19 05:01:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 05:01:51,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-19 05:01:51,462 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2023-11-19 05:01:51,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:51,463 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-19 05:01:51,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:01:51,463 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-19 05:01:51,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 05:01:51,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:51,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:51,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:01:51,473 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:51,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:51,474 INFO L85 PathProgramCache]: Analyzing trace with hash 496345742, now seen corresponding path program 1 times [2023-11-19 05:01:51,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:51,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625499015] [2023-11-19 05:01:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:51,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:51,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:01:51,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486377712] [2023-11-19 05:01:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:51,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:51,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:51,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:51,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:01:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:51,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:01:51,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:01:51,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:51,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:51,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625499015] [2023-11-19 05:01:51,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:01:51,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486377712] [2023-11-19 05:01:51,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486377712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:51,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:51,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:01:51,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187523240] [2023-11-19 05:01:51,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:51,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:51,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:51,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:51,792 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:01:51,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:51,949 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2023-11-19 05:01:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2023-11-19 05:01:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:51,955 INFO L225 Difference]: With dead ends: 60 [2023-11-19 05:01:51,955 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 05:01:51,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:51,957 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:51,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 95 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:01:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 05:01:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-19 05:01:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-19 05:01:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2023-11-19 05:01:51,975 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 27 [2023-11-19 05:01:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:51,976 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2023-11-19 05:01:51,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:01:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2023-11-19 05:01:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 05:01:51,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:51,978 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:52,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:52,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:52,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:52,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1046956766, now seen corresponding path program 1 times [2023-11-19 05:01:52,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:52,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021382304] [2023-11-19 05:01:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:52,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:01:52,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024825590] [2023-11-19 05:01:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:52,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:52,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:52,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:52,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:01:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:52,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:01:52,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:01:52,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:01:52,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:52,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021382304] [2023-11-19 05:01:52,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:01:52,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024825590] [2023-11-19 05:01:52,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024825590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:01:52,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:01:52,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:01:52,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051295568] [2023-11-19 05:01:52,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:52,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:52,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:01:52,364 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:01:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:52,436 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2023-11-19 05:01:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:52,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2023-11-19 05:01:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:52,439 INFO L225 Difference]: With dead ends: 59 [2023-11-19 05:01:52,439 INFO L226 Difference]: Without dead ends: 52 [2023-11-19 05:01:52,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:01:52,441 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:52,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 84 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-19 05:01:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-11-19 05:01:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 05:01:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2023-11-19 05:01:52,458 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 34 [2023-11-19 05:01:52,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:52,459 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2023-11-19 05:01:52,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:01:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2023-11-19 05:01:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:01:52,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:52,461 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:01:52,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:52,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:52,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:52,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash -202147981, now seen corresponding path program 1 times [2023-11-19 05:01:52,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:52,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340135734] [2023-11-19 05:01:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:52,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:01:52,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077659945] [2023-11-19 05:01:52,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:52,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:52,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:52,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:52,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:01:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:52,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:01:52,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 05:01:52,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:01:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 05:01:52,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:52,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340135734] [2023-11-19 05:01:52,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:01:52,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077659945] [2023-11-19 05:01:52,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077659945] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:01:52,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:01:52,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 05:01:52,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653300574] [2023-11-19 05:01:52,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:01:52,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:01:52,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:01:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:01:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:01:52,955 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:01:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:01:53,028 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-11-19 05:01:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:01:53,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-11-19 05:01:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:01:53,030 INFO L225 Difference]: With dead ends: 58 [2023-11-19 05:01:53,030 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 05:01:53,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 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 05:01:53,032 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:01:53,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 91 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:01:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 05:01:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-11-19 05:01:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 05:01:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-11-19 05:01:53,050 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 44 [2023-11-19 05:01:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:01:53,051 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-11-19 05:01:53,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:01:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-11-19 05:01:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 05:01:53,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:01:53,054 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 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] [2023-11-19 05:01:53,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:01:53,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:53,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:01:53,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:01:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash 166119996, now seen corresponding path program 1 times [2023-11-19 05:01:53,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:01:53,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466756902] [2023-11-19 05:01:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:53,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:01:53,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:01:53,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778815009] [2023-11-19 05:01:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:01:53,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:01:53,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:01:53,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:01:53,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:01:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:01:53,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 05:01:53,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:01:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-11-19 05:01:54,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:01:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-19 05:01:59,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:01:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466756902] [2023-11-19 05:01:59,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:01:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778815009] [2023-11-19 05:01:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778815009] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:01:59,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290740252] [2023-11-19 05:01:59,113 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-19 05:01:59,113 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:01:59,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:01:59,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:01:59,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:02:03,297 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-19 05:02:03,302 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 05:02:03,304 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:02:04,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1631#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:02:04,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:02:04,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:02:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-11-19 05:02:04,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129316531] [2023-11-19 05:02:04,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:02:04,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 05:02:04,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:04,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 05:02:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2023-11-19 05:02:04,750 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-19 05:02:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:06,449 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2023-11-19 05:02:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:02:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2023-11-19 05:02:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:06,453 INFO L225 Difference]: With dead ends: 124 [2023-11-19 05:02:06,454 INFO L226 Difference]: Without dead ends: 112 [2023-11-19 05:02:06,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 05:02:06,456 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:06,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 241 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:02:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-19 05:02:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2023-11-19 05:02:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 60 states have internal predecessors, (65), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-19 05:02:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2023-11-19 05:02:06,506 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 63 [2023-11-19 05:02:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:06,507 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2023-11-19 05:02:06,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2023-11-19 05:02:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2023-11-19 05:02:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:02:06,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:06,509 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:06,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:02:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:06,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:06,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1699758119, now seen corresponding path program 2 times [2023-11-19 05:02:06,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:06,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221905637] [2023-11-19 05:02:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:06,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:02:06,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935898419] [2023-11-19 05:02:06,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:02:06,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:06,761 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:06,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:02:06,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 05:02:06,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:02:06,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 05:02:06,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-19 05:02:06,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:02:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-19 05:02:08,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:08,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221905637] [2023-11-19 05:02:08,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:02:08,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935898419] [2023-11-19 05:02:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935898419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:02:08,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2075484694] [2023-11-19 05:02:08,039 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-19 05:02:08,039 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:02:08,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:02:08,040 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:02:08,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:02:10,358 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-19 05:02:10,362 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 05:02:10,363 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:02:11,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2411#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:02:11,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:02:11,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 05:02:11,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-11-19 05:02:11,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213377] [2023-11-19 05:02:11,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 05:02:11,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 05:02:11,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 05:02:11,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:02:11,132 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-19 05:02:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:11,644 INFO L93 Difference]: Finished difference Result 127 states and 161 transitions. [2023-11-19 05:02:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:02:11,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 68 [2023-11-19 05:02:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:11,651 INFO L225 Difference]: With dead ends: 127 [2023-11-19 05:02:11,652 INFO L226 Difference]: Without dead ends: 108 [2023-11-19 05:02:11,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-11-19 05:02:11,655 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:11,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 251 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:02:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-19 05:02:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-19 05:02:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 64 states have internal predecessors, (68), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-19 05:02:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2023-11-19 05:02:11,717 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 68 [2023-11-19 05:02:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:11,718 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2023-11-19 05:02:11,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-19 05:02:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2023-11-19 05:02:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 05:02:11,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:11,721 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:11,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 05:02:11,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:11,941 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:11,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1987386298, now seen corresponding path program 1 times [2023-11-19 05:02:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851298615] [2023-11-19 05:02:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:11,951 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:02:11,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200167469] [2023-11-19 05:02:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:11,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:11,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:11,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:11,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:02:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:02:12,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 05:02:12,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-19 05:02:12,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:02:13,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:02:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851298615] [2023-11-19 05:02:13,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:02:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200167469] [2023-11-19 05:02:13,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200167469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:02:13,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2056852727] [2023-11-19 05:02:13,107 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-19 05:02:13,107 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:02:13,107 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:02:13,107 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:02:13,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:02:17,703 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-19 05:02:17,707 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-19 05:02:17,711 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:02:18,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3080#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 05:02:18,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:02:18,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:02:18,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-19 05:02:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533071134] [2023-11-19 05:02:18,504 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 05:02:18,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 05:02:18,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:02:18,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 05:02:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2023-11-19 05:02:18,506 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-19 05:02:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:02:18,863 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2023-11-19 05:02:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:02:18,864 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 74 [2023-11-19 05:02:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:02:18,865 INFO L225 Difference]: With dead ends: 114 [2023-11-19 05:02:18,866 INFO L226 Difference]: Without dead ends: 99 [2023-11-19 05:02:18,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2023-11-19 05:02:18,868 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:02:18,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 235 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:02:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-19 05:02:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-19 05:02:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 29 states have call successors, (29), 12 states have call predecessors, (29), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 05:02:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2023-11-19 05:02:18,911 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 74 [2023-11-19 05:02:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:02:18,911 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2023-11-19 05:02:18,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-19 05:02:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2023-11-19 05:02:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 05:02:18,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:02:18,914 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:02:18,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 05:02:19,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:19,129 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:02:19,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:02:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash 339357760, now seen corresponding path program 3 times [2023-11-19 05:02:19,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:02:19,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685508077] [2023-11-19 05:02:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:02:19,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:02:19,139 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:02:19,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412664230] [2023-11-19 05:02:19,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:02:19,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:02:19,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:02:19,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:02:19,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4115c033-1254-4800-808c-16889b285e90/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:02:19,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:02:19,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:02:19,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-19 05:02:19,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:02:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 72 proven. 45 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-11-19 05:02:20,168 INFO L327 TraceCheckSpWp]: Computing backward predicates...