./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --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 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:24:07,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:24:07,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:24:07,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:24:07,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:24:07,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:24:07,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:24:07,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:24:07,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:24:07,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:24:07,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:24:07,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:24:07,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:24:07,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:24:07,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:24:07,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:24:07,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:24:07,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:24:07,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:24:07,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:24:07,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:24:07,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:24:07,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:24:07,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:24:07,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:24:07,692 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:24:07,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:24:07,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:24:07,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:24:07,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:24:07,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:24:07,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:24:07,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:24:07,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:24:07,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:24:07,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:24:07,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:24:07,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:24:07,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:24:07,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:24:07,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:24:07,700 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:24:07,715 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:24:07,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:24:07,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:24:07,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:24:07,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:24:07,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:24:07,716 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:24:07,716 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:24:07,716 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:24:07,717 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:24:07,717 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:24:07,717 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:24:07,717 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:24:07,717 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:24:07,717 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:24:07,718 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:24:07,718 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:24:07,718 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:24:07,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:24:07,719 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:24:07,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:24:07,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:24:07,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:24:07,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:24:07,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:24:07,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:24:07,720 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:24:07,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:24:07,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:24:07,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:24:07,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:24:07,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:24:07,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:24:07,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:24:07,721 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:24:07,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:24:07,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:24:07,721 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:24:07,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:24:07,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:24:07,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:24:07,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2022-12-14 12:24:07,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:24:07,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:24:07,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:24:07,906 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:24:07,907 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:24:07,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2022-12-14 12:24:10,554 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:24:10,673 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:24:10,674 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2022-12-14 12:24:10,678 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/data/37fb34f9a/907d4e2b8c584bb7977637f39c1f505d/FLAG42c0821de [2022-12-14 12:24:10,688 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/data/37fb34f9a/907d4e2b8c584bb7977637f39c1f505d [2022-12-14 12:24:10,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:24:10,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:24:10,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:24:10,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:24:10,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:24:10,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5747fd07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10, skipping insertion in model container [2022-12-14 12:24:10,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:24:10,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:24:10,812 WARN L237 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_d2981295-9252-499d-baea-bf66c68a7009/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2022-12-14 12:24:10,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:24:10,830 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:24:10,839 WARN L237 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_d2981295-9252-499d-baea-bf66c68a7009/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2022-12-14 12:24:10,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:24:10,852 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:24:10,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10 WrapperNode [2022-12-14 12:24:10,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:24:10,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:24:10,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:24:10,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:24:10,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,875 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2022-12-14 12:24:10,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:24:10,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:24:10,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:24:10,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:24:10,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,887 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:24:10,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:24:10,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:24:10,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:24:10,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (1/1) ... [2022-12-14 12:24:10,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:24:10,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:10,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:24:10,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:24:10,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:24:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:24:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:24:10,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:24:10,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:24:10,947 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:24:11,005 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:24:11,007 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:24:11,110 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:24:11,126 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:24:11,126 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 12:24:11,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:24:11 BoogieIcfgContainer [2022-12-14 12:24:11,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:24:11,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:24:11,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:24:11,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:24:11,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:24:10" (1/3) ... [2022-12-14 12:24:11,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e5e115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:24:11, skipping insertion in model container [2022-12-14 12:24:11,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:24:10" (2/3) ... [2022-12-14 12:24:11,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e5e115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:24:11, skipping insertion in model container [2022-12-14 12:24:11,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:24:11" (3/3) ... [2022-12-14 12:24:11,137 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2022-12-14 12:24:11,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:24:11,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:24:11,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:24:11,201 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=LoopsAndPotentialCycles, 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;@560faf32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:24:11,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:24:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:24:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:24:11,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:11,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 12:24:11,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:24:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2070802916, now seen corresponding path program 1 times [2022-12-14 12:24:11,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:11,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430087164] [2022-12-14 12:24:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:11,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:11,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430087164] [2022-12-14 12:24:11,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 12:24:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504405264] [2022-12-14 12:24:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:11,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:11,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:11,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:11,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:24:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 12:24:11,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:11,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:24:11,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504405264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:24:11,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:24:11,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:24:11,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130919804] [2022-12-14 12:24:11,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:24:11,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 12:24:11,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:11,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 12:24:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:24:11,420 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:11,443 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-12-14 12:24:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 12:24:11,446 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 12:24:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:11,453 INFO L225 Difference]: With dead ends: 29 [2022-12-14 12:24:11,453 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 12:24:11,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:24:11,461 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:11,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:24:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 12:24:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 12:24:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:24:11,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-12-14 12:24:11,494 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2022-12-14 12:24:11,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:11,495 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-12-14 12:24:11,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:11,495 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-12-14 12:24:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:24:11,496 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:11,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:11,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:24:11,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:11,698 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:24:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash -170804699, now seen corresponding path program 1 times [2022-12-14 12:24:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:11,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76342612] [2022-12-14 12:24:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:11,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:11,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:11,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76342612] [2022-12-14 12:24:11,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 12:24:11,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771203788] [2022-12-14 12:24:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:11,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:11,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:11,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:11,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:24:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:11,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:24:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:11,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:24:11,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771203788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:24:11,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:24:11,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:24:11,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434819093] [2022-12-14 12:24:11,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:24:11,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:24:11,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:24:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:24:11,837 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:11,852 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-12-14 12:24:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:24:11,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 12:24:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:11,853 INFO L225 Difference]: With dead ends: 23 [2022-12-14 12:24:11,854 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 12:24:11,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:24:11,855 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:11,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:24:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 12:24:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 12:24:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:24:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-12-14 12:24:11,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2022-12-14 12:24:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:11,860 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-12-14 12:24:11,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-12-14 12:24:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:24:11,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:11,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:11,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:24:12,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:12,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:24:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:12,066 INFO L85 PathProgramCache]: Analyzing trace with hash -169017239, now seen corresponding path program 1 times [2022-12-14 12:24:12,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:12,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048150969] [2022-12-14 12:24:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:12,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:12,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:24:12,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613505601] [2022-12-14 12:24:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:12,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:12,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:12,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:12,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:24:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:24:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:12,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:24:12,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048150969] [2022-12-14 12:24:12,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:24:12,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613505601] [2022-12-14 12:24:12,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613505601] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:24:12,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:24:12,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:24:12,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779683960] [2022-12-14 12:24:12,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:24:12,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:24:12,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:24:12,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:24:12,214 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:12,260 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-12-14 12:24:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:24:12,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 12:24:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:12,261 INFO L225 Difference]: With dead ends: 25 [2022-12-14 12:24:12,262 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 12:24:12,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:24:12,263 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:12,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:24:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 12:24:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 12:24:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:24:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 12:24:12,271 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2022-12-14 12:24:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:12,271 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 12:24:12,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:24:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 12:24:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:24:12,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:12,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:12,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:24:12,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:12,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:24:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:12,476 INFO L85 PathProgramCache]: Analyzing trace with hash 867499275, now seen corresponding path program 1 times [2022-12-14 12:24:12,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:12,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597677486] [2022-12-14 12:24:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:12,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:12,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:24:12,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540481798] [2022-12-14 12:24:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:12,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:12,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:12,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:12,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:24:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:24:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:12,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:24:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:12,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597677486] [2022-12-14 12:24:12,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:24:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540481798] [2022-12-14 12:24:12,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540481798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:24:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1916666763] [2022-12-14 12:24:12,655 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:24:12,656 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:24:12,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:24:12,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:24:12,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:24:13,168 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-12-14 12:24:13,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:24:14,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '350#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 12:24:14,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:24:14,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:24:14,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-12-14 12:24:14,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46652537] [2022-12-14 12:24:14,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:24:14,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:24:14,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:14,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:24:14,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:24:14,051 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:24:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:14,126 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-12-14 12:24:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:24:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-12-14 12:24:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:14,127 INFO L225 Difference]: With dead ends: 55 [2022-12-14 12:24:14,127 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 12:24:14,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:24:14,129 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:14,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:24:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 12:24:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-12-14 12:24:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 12:24:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-12-14 12:24:14,135 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2022-12-14 12:24:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:14,135 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-12-14 12:24:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:24:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-12-14 12:24:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:24:14,135 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:14,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:14,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:24:14,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:14,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:24:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:14,339 INFO L85 PathProgramCache]: Analyzing trace with hash 869286735, now seen corresponding path program 1 times [2022-12-14 12:24:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:14,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487945480] [2022-12-14 12:24:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:14,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:24:14,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048490450] [2022-12-14 12:24:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:14,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:14,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:14,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:14,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:24:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:14,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 12:24:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:14,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:24:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:24:14,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:24:14,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487945480] [2022-12-14 12:24:14,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:24:14,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048490450] [2022-12-14 12:24:14,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048490450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:24:14,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [222758048] [2022-12-14 12:24:14,617 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 12:24:14,617 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:24:14,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:24:14,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:24:14,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:24:14,916 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2022-12-14 12:24:14,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:24:15,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:24:15,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:24:15,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:24:15,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-12-14 12:24:15,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054517799] [2022-12-14 12:24:15,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:24:15,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:24:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:24:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:24:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:24:15,316 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:24:15,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:15,408 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-12-14 12:24:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:24:15,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-12-14 12:24:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:15,409 INFO L225 Difference]: With dead ends: 57 [2022-12-14 12:24:15,409 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 12:24:15,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:24:15,411 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:15,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 42 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:24:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 12:24:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-12-14 12:24:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:24:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-12-14 12:24:15,416 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2022-12-14 12:24:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:15,416 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-12-14 12:24:15,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:24:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-12-14 12:24:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:24:15,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:15,417 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:15,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:24:15,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:15,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:24:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash 24753612, now seen corresponding path program 1 times [2022-12-14 12:24:15,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:24:15,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654961440] [2022-12-14 12:24:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:15,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:24:15,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:24:15,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523605934] [2022-12-14 12:24:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:15,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:15,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:15,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:15,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:24:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 12:24:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:24:15,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:24:41,928 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0)))) is different from true [2022-12-14 12:24:59,975 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_22|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 12:25:08,019 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:25:10,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:25:10,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654961440] [2022-12-14 12:25:10,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:25:10,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523605934] [2022-12-14 12:25:10,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523605934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:10,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573006022] [2022-12-14 12:25:10,046 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:25:10,046 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:25:10,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:25:10,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:25:10,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:25:10,313 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:25:10,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:25:25,497 WARN L233 SmtUtils]: Spent 14.73s on a formula simplification. DAG size of input: 64 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:25:27,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '862#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:25:27,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:25:27,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:25:27,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-12-14 12:25:27,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643850764] [2022-12-14 12:25:27,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:25:27,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:25:27,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:25:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:25:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=393, Unknown=5, NotChecked=126, Total=600 [2022-12-14 12:25:27,186 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:25:27,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:27,268 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-12-14 12:25:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:25:27,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-12-14 12:25:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:27,269 INFO L225 Difference]: With dead ends: 45 [2022-12-14 12:25:27,269 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 12:25:27,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=98, Invalid=509, Unknown=5, NotChecked=144, Total=756 [2022-12-14 12:25:27,270 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:27,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:25:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 12:25:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 12:25:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:25:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-12-14 12:25:27,274 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 21 [2022-12-14 12:25:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:27,275 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-12-14 12:25:27,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:25:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-12-14 12:25:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 12:25:27,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:27,276 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-12-14 12:25:27,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:25:27,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 12:25:27,478 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:25:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash 44232242, now seen corresponding path program 2 times [2022-12-14 12:25:27,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:25:27,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124886561] [2022-12-14 12:25:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:27,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:25:27,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:25:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514527319] [2022-12-14 12:25:27,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:25:27,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:27,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:25:27,496 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:25:27,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:25:27,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:25:27,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:25:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:25:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:25:27,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:31,780 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:25:31,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:25:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124886561] [2022-12-14 12:25:31,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:25:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514527319] [2022-12-14 12:25:31,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514527319] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511365558] [2022-12-14 12:25:31,784 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:25:31,784 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:25:31,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:25:31,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:25:31,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:25:32,042 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:25:32,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:25:34,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1135#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:25:34,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:25:34,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:25:34,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-12-14 12:25:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565216690] [2022-12-14 12:25:34,981 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:25:34,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:25:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:25:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:25:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=438, Unknown=2, NotChecked=42, Total=552 [2022-12-14 12:25:34,982 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:25:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:35,103 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-12-14 12:25:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:25:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-12-14 12:25:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:35,104 INFO L225 Difference]: With dead ends: 45 [2022-12-14 12:25:35,104 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 12:25:35,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=91, Invalid=561, Unknown=2, NotChecked=48, Total=702 [2022-12-14 12:25:35,106 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:35,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:25:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 12:25:35,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 12:25:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:25:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-12-14 12:25:35,111 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 29 [2022-12-14 12:25:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:35,112 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-12-14 12:25:35,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:25:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-12-14 12:25:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 12:25:35,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:35,112 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2022-12-14 12:25:35,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:25:35,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:35,314 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:25:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:35,315 INFO L85 PathProgramCache]: Analyzing trace with hash -698851176, now seen corresponding path program 3 times [2022-12-14 12:25:35,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:25:35,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653216501] [2022-12-14 12:25:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:35,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:25:35,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:25:35,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100603306] [2022-12-14 12:25:35,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:25:35,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:35,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:25:35,331 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:25:35,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:25:35,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:25:35,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:25:35,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 12:25:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:25:35,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:39,666 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:25:39,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:25:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653216501] [2022-12-14 12:25:39,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:25:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100603306] [2022-12-14 12:25:39,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100603306] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808331311] [2022-12-14 12:25:39,670 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:25:39,670 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:25:39,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:25:39,671 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:25:39,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:25:39,913 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:25:39,954 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:25:43,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1433#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:25:43,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:25:43,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:25:43,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-12-14 12:25:43,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004566928] [2022-12-14 12:25:43,230 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:25:43,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:25:43,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:25:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:25:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=481, Unknown=2, NotChecked=44, Total=600 [2022-12-14 12:25:43,232 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:25:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:43,355 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-12-14 12:25:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:25:43,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-12-14 12:25:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:43,356 INFO L225 Difference]: With dead ends: 47 [2022-12-14 12:25:43,356 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 12:25:43,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=94, Invalid=610, Unknown=2, NotChecked=50, Total=756 [2022-12-14 12:25:43,357 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:43,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:25:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 12:25:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-14 12:25:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 12:25:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-12-14 12:25:43,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2022-12-14 12:25:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:43,364 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-12-14 12:25:43,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:25:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-12-14 12:25:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 12:25:43,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:43,365 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 12:25:43,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:25:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:43,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:25:43,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash -795795011, now seen corresponding path program 2 times [2022-12-14 12:25:43,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:25:43,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459756207] [2022-12-14 12:25:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:43,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:25:43,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:25:43,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229469846] [2022-12-14 12:25:43,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:25:43,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:43,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:25:43,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:25:43,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:25:43,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 12:25:43,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:25:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 12:25:43,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:25:43,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:25:43,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:25:43,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459756207] [2022-12-14 12:25:43,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:25:43,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229469846] [2022-12-14 12:25:43,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229469846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:25:43,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842393403] [2022-12-14 12:25:43,726 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:25:43,726 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:25:43,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:25:43,727 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:25:43,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:25:43,974 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-12-14 12:25:44,019 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:25:44,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1813#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:25:44,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:25:44,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:25:44,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-12-14 12:25:44,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631374888] [2022-12-14 12:25:44,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:25:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:25:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:25:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:25:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:25:44,557 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 12:25:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:44,696 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2022-12-14 12:25:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:25:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2022-12-14 12:25:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:44,697 INFO L225 Difference]: With dead ends: 118 [2022-12-14 12:25:44,697 INFO L226 Difference]: Without dead ends: 113 [2022-12-14 12:25:44,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:25:44,698 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:44,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 132 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:25:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-14 12:25:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2022-12-14 12:25:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:25:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-12-14 12:25:44,706 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 39 [2022-12-14 12:25:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:44,706 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-12-14 12:25:44,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 12:25:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-12-14 12:25:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:25:44,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:44,707 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2022-12-14 12:25:44,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:25:44,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 12:25:44,909 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:25:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:44,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1312813826, now seen corresponding path program 4 times [2022-12-14 12:25:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:25:44,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642130833] [2022-12-14 12:25:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:25:44,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:25:44,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:25:44,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145680033] [2022-12-14 12:25:44,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:25:44,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:44,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:25:44,934 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:25:44,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:25:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:25:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 12:25:45,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:25:45,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:23,335 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 2)) 4) 0)))) is different from true [2022-12-14 12:26:41,378 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_71|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_85| 2)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 12:26:49,420 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:26:51,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642130833] [2022-12-14 12:26:51,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:26:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145680033] [2022-12-14 12:26:51,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145680033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203795610] [2022-12-14 12:26:51,443 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:26:51,443 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:26:51,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:26:51,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:26:51,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:26:51,683 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:26:51,731 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:26:54,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2316#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 12:26:54,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:26:54,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:26:54,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-12-14 12:26:54,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966389816] [2022-12-14 12:26:54,284 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:26:54,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:26:54,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:26:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:26:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=520, Unknown=10, NotChecked=144, Total=756 [2022-12-14 12:26:54,285 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 12:26:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:54,414 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-12-14 12:26:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:26:54,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-12-14 12:26:54,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:54,415 INFO L225 Difference]: With dead ends: 93 [2022-12-14 12:26:54,415 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:26:54,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=104, Invalid=654, Unknown=10, NotChecked=162, Total=930 [2022-12-14 12:26:54,416 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:54,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 131 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:26:54,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:26:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 12:26:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:26:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-12-14 12:26:54,424 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 45 [2022-12-14 12:26:54,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:54,424 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-12-14 12:26:54,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 12:26:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-12-14 12:26:54,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 12:26:54,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:54,425 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1] [2022-12-14 12:26:54,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 12:26:54,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:26:54,627 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:26:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1140847460, now seen corresponding path program 5 times [2022-12-14 12:26:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:26:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454063838] [2022-12-14 12:26:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:26:54,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:26:54,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:26:54,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380635126] [2022-12-14 12:26:54,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:26:54,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:26:54,651 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:26:54,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:26:54,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 12:26:54,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:26:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 12:26:54,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:26:54,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:58,983 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:26:58,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:26:58,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454063838] [2022-12-14 12:26:58,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:26:58,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380635126] [2022-12-14 12:26:58,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380635126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:58,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [859900783] [2022-12-14 12:26:58,987 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:26:58,987 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:26:58,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:26:58,987 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:26:58,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:26:59,222 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:26:59,268 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:27:02,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2796#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:27:02,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:27:02,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:27:02,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-12-14 12:27:02,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070830119] [2022-12-14 12:27:02,702 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:27:02,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:27:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:27:02,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:27:02,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=572, Unknown=2, NotChecked=48, Total=702 [2022-12-14 12:27:02,703 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 12:27:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:27:02,905 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2022-12-14 12:27:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 12:27:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-12-14 12:27:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:27:02,906 INFO L225 Difference]: With dead ends: 93 [2022-12-14 12:27:02,907 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:27:02,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=101, Invalid=713, Unknown=2, NotChecked=54, Total=870 [2022-12-14 12:27:02,908 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:27:02,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 180 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:27:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:27:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 12:27:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:27:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-12-14 12:27:02,919 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 53 [2022-12-14 12:27:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:27:02,919 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-12-14 12:27:02,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 12:27:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-12-14 12:27:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:27:02,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:27:02,921 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1] [2022-12-14 12:27:02,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:27:03,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:03,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:27:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:27:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1237445686, now seen corresponding path program 6 times [2022-12-14 12:27:03,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:27:03,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870727694] [2022-12-14 12:27:03,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:03,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:27:03,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:27:03,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831483416] [2022-12-14 12:27:03,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:27:03,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:03,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:03,150 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:03,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:27:03,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:27:03,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:27:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 12:27:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 12:27:03,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:03,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:27:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870727694] [2022-12-14 12:27:03,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:27:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831483416] [2022-12-14 12:27:03,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831483416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919099257] [2022-12-14 12:27:03,496 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:27:03,496 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:27:03,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:27:03,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:27:03,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:27:03,687 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:27:03,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:27:08,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3300#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:27:08,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:27:08,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:27:08,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-12-14 12:27:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847989093] [2022-12-14 12:27:08,038 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:27:08,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:27:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:27:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:27:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=620, Unknown=1, NotChecked=0, Total=702 [2022-12-14 12:27:08,039 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 12:27:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:27:08,262 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-12-14 12:27:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:27:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-12-14 12:27:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:27:08,263 INFO L225 Difference]: With dead ends: 93 [2022-12-14 12:27:08,263 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:27:08,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=102, Invalid=767, Unknown=1, NotChecked=0, Total=870 [2022-12-14 12:27:08,263 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:27:08,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 221 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:27:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:27:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 12:27:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:27:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-12-14 12:27:08,270 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 61 [2022-12-14 12:27:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:27:08,270 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-12-14 12:27:08,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 12:27:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-12-14 12:27:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 12:27:08,270 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:27:08,271 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1] [2022-12-14 12:27:08,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:27:08,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:27:08,472 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:27:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:27:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1415549392, now seen corresponding path program 7 times [2022-12-14 12:27:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:27:08,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116753649] [2022-12-14 12:27:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:27:08,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:27:08,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:27:08,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448413232] [2022-12-14 12:27:08,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:27:08,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:08,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:08,497 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:08,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:27:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:27:08,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 12:27:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 36 proven. 113 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 12:27:08,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:12,819 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:27:28,858 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_116| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_116|)))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-12-14 12:27:46,911 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_116| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_142| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_116|)))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 12:27:54,944 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:28:51,446 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 4 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:29:01,499 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 25) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 5 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:29:31,598 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 6)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 49 (* |c_ULTIMATE.start_main_~y~0#1| 14)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|) (* 7 |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:29:33,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:33,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116753649] [2022-12-14 12:29:33,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:29:33,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448413232] [2022-12-14 12:29:33,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448413232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:33,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473686209] [2022-12-14 12:29:33,620 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:29:33,620 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:29:33,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:29:33,621 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:29:33,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:29:33,845 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:29:33,893 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:29:34,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3982#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:29:34,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:29:34,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:29:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-12-14 12:29:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731392865] [2022-12-14 12:29:34,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:29:34,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:29:34,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:29:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=761, Unknown=14, NotChecked=434, Total=1332 [2022-12-14 12:29:34,618 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 12:29:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:34,827 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-12-14 12:29:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:29:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-12-14 12:29:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:34,829 INFO L225 Difference]: With dead ends: 93 [2022-12-14 12:29:34,829 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:29:34,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=147, Invalid=923, Unknown=14, NotChecked=476, Total=1560 [2022-12-14 12:29:34,830 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:34,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 248 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:29:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:29:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 12:29:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:29:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-12-14 12:29:34,836 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 69 [2022-12-14 12:29:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:34,836 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-12-14 12:29:34,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 12:29:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-12-14 12:29:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 12:29:34,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:34,837 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1] [2022-12-14 12:29:34,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:29:35,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:29:35,039 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1095565974, now seen corresponding path program 8 times [2022-12-14 12:29:35,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:35,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850226821] [2022-12-14 12:29:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:35,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:29:35,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527172902] [2022-12-14 12:29:35,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:29:35,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:35,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:35,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:29:35,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 12:29:35,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:29:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 12:29:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 32 proven. 154 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 12:29:35,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:35,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:35,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850226821] [2022-12-14 12:29:35,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:29:35,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527172902] [2022-12-14 12:29:35,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527172902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:35,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268359794] [2022-12-14 12:29:35,517 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:29:35,517 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:29:35,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:29:35,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:29:35,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:29:35,721 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:29:35,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:29:36,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4536#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:29:36,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:29:36,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:29:36,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-12-14 12:29:36,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768315033] [2022-12-14 12:29:36,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:29:36,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 12:29:36,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 12:29:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:29:36,912 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 12:29:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:37,202 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2022-12-14 12:29:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 12:29:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-12-14 12:29:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:37,203 INFO L225 Difference]: With dead ends: 93 [2022-12-14 12:29:37,203 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:29:37,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:29:37,203 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:37,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 295 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:29:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:29:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 12:29:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:29:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-12-14 12:29:37,209 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 77 [2022-12-14 12:29:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:37,209 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-12-14 12:29:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 12:29:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-12-14 12:29:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 12:29:37,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:37,210 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1] [2022-12-14 12:29:37,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 12:29:37,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:37,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash 241815804, now seen corresponding path program 9 times [2022-12-14 12:29:37,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:37,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35009258] [2022-12-14 12:29:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:37,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:37,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:29:37,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527282412] [2022-12-14 12:29:37,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:29:37,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:37,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:37,432 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:37,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:29:37,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:29:37,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:29:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 12:29:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 19 proven. 208 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 12:29:37,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:38,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:38,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35009258] [2022-12-14 12:29:38,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:29:38,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527282412] [2022-12-14 12:29:38,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527282412] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:38,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508995842] [2022-12-14 12:29:38,006 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:29:38,006 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:29:38,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:29:38,007 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:29:38,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:29:38,199 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:29:38,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:29:39,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5115#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:29:39,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:29:39,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:29:39,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-12-14 12:29:39,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742001183] [2022-12-14 12:29:39,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:29:39,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:29:39,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:29:39,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:29:39,527 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:29:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:39,813 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2022-12-14 12:29:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 12:29:39,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-12-14 12:29:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:39,814 INFO L225 Difference]: With dead ends: 95 [2022-12-14 12:29:39,814 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 12:29:39,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 12:29:39,815 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:39,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 346 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:29:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 12:29:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-12-14 12:29:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 12:29:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-12-14 12:29:39,821 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2022-12-14 12:29:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:39,821 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-12-14 12:29:39,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 12:29:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-12-14 12:29:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 12:29:39,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:39,822 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 12:29:39,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:29:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:29:40,023 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1242040609, now seen corresponding path program 3 times [2022-12-14 12:29:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:40,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608752967] [2022-12-14 12:29:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:40,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:29:40,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218863640] [2022-12-14 12:29:40,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:29:40,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:40,049 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:40,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:29:40,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:29:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:29:40,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:29:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:29:40,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-14 12:29:40,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608752967] [2022-12-14 12:29:40,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:29:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218863640] [2022-12-14 12:29:40,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218863640] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:29:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108996834] [2022-12-14 12:29:40,549 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:29:40,549 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:29:40,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:29:40,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:29:40,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:29:40,774 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-12-14 12:29:40,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:29:41,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5927#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:29:41,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:29:41,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:29:41,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-12-14 12:29:41,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427536064] [2022-12-14 12:29:41,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:29:41,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 12:29:41,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:41,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 12:29:41,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=818, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 12:29:41,272 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 12:29:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:41,657 INFO L93 Difference]: Finished difference Result 244 states and 256 transitions. [2022-12-14 12:29:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 12:29:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 87 [2022-12-14 12:29:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:41,659 INFO L225 Difference]: With dead ends: 244 [2022-12-14 12:29:41,659 INFO L226 Difference]: Without dead ends: 239 [2022-12-14 12:29:41,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=819, Invalid=2151, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 12:29:41,662 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 211 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:41,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 202 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:29:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-12-14 12:29:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 184. [2022-12-14 12:29:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 138 states have internal predecessors, (151), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:29:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 196 transitions. [2022-12-14 12:29:41,672 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 196 transitions. Word has length 87 [2022-12-14 12:29:41,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:41,672 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 196 transitions. [2022-12-14 12:29:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 12:29:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 196 transitions. [2022-12-14 12:29:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 12:29:41,673 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:41,673 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1] [2022-12-14 12:29:41,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 12:29:41,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:29:41,875 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:41,875 INFO L85 PathProgramCache]: Analyzing trace with hash 605870434, now seen corresponding path program 10 times [2022-12-14 12:29:41,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:41,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721943187] [2022-12-14 12:29:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:41,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:41,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:29:41,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802539104] [2022-12-14 12:29:41,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:29:41,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:41,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:41,901 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:41,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 12:29:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:42,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 12:29:42,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 51 proven. 221 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 12:29:42,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:46,316 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:30:06,356 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_171| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_171|))))) is different from true [2022-12-14 12:30:24,399 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_171| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_224| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_171|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 12:30:32,449 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:30:34,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:34,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721943187] [2022-12-14 12:30:34,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:34,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802539104] [2022-12-14 12:30:34,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802539104] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:30:34,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787472279] [2022-12-14 12:30:34,471 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:30:34,472 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:34,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:34,472 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:34,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:34,689 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:30:34,734 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:35,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6910#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:30:35,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:35,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:30:35,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-12-14 12:30:35,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780189177] [2022-12-14 12:30:35,682 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:35,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:30:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:30:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=793, Unknown=4, NotChecked=236, Total=1122 [2022-12-14 12:30:35,683 INFO L87 Difference]: Start difference. First operand 184 states and 196 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 12:30:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:36,026 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2022-12-14 12:30:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 12:30:36,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 93 [2022-12-14 12:30:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:36,028 INFO L225 Difference]: With dead ends: 189 [2022-12-14 12:30:36,028 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 12:30:36,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=110, Invalid=958, Unknown=4, NotChecked=260, Total=1332 [2022-12-14 12:30:36,028 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:36,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 425 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:30:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 12:30:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-12-14 12:30:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0869565217391304) internal successors, (150), 138 states have internal predecessors, (150), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:30:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 195 transitions. [2022-12-14 12:30:36,039 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 195 transitions. Word has length 93 [2022-12-14 12:30:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:36,039 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 195 transitions. [2022-12-14 12:30:36,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 12:30:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 195 transitions. [2022-12-14 12:30:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 12:30:36,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:36,040 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1] [2022-12-14 12:30:36,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 12:30:36,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:30:36,242 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash 227285960, now seen corresponding path program 11 times [2022-12-14 12:30:36,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:36,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993133543] [2022-12-14 12:30:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:36,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:36,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:36,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831374123] [2022-12-14 12:30:36,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:30:36,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:36,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:36,270 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:36,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 12:30:36,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 12:30:36,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:30:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 12:30:36,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 38 proven. 283 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 12:30:36,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:36,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:36,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993133543] [2022-12-14 12:30:36,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831374123] [2022-12-14 12:30:36,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831374123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:30:36,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30667409] [2022-12-14 12:30:36,824 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:30:36,824 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:36,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:36,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:36,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:37,026 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:30:37,068 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:37,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7803#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:30:37,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:37,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:30:37,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-12-14 12:30:37,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998982973] [2022-12-14 12:30:37,948 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:37,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 12:30:37,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 12:30:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:30:37,949 INFO L87 Difference]: Start difference. First operand 184 states and 195 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 12:30:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:38,324 INFO L93 Difference]: Finished difference Result 189 states and 199 transitions. [2022-12-14 12:30:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 12:30:38,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 101 [2022-12-14 12:30:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:38,326 INFO L225 Difference]: With dead ends: 189 [2022-12-14 12:30:38,326 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 12:30:38,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:30:38,327 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:38,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 460 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:30:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 12:30:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-12-14 12:30:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:30:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 194 transitions. [2022-12-14 12:30:38,337 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 194 transitions. Word has length 101 [2022-12-14 12:30:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:38,337 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 194 transitions. [2022-12-14 12:30:38,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 12:30:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 194 transitions. [2022-12-14 12:30:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 12:30:38,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:38,338 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1] [2022-12-14 12:30:38,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 12:30:38,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 12:30:38,540 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash -807561170, now seen corresponding path program 12 times [2022-12-14 12:30:38,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:38,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570409186] [2022-12-14 12:30:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:38,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:38,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:38,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688598130] [2022-12-14 12:30:38,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:30:38,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:38,571 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:38,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:30:38,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:30:38,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:30:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 12:30:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 349 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-14 12:30:39,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:39,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570409186] [2022-12-14 12:30:39,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688598130] [2022-12-14 12:30:39,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688598130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:30:39,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176502061] [2022-12-14 12:30:39,193 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:30:39,194 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:39,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:39,194 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:39,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:39,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:30:39,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:40,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8721#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:30:40,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:40,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:30:40,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-12-14 12:30:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072718261] [2022-12-14 12:30:40,354 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:40,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:30:40,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:30:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 12:30:40,355 INFO L87 Difference]: Start difference. First operand 184 states and 194 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 12:30:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:40,815 INFO L93 Difference]: Finished difference Result 189 states and 198 transitions. [2022-12-14 12:30:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 12:30:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 109 [2022-12-14 12:30:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:40,817 INFO L225 Difference]: With dead ends: 189 [2022-12-14 12:30:40,817 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 12:30:40,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 12:30:40,818 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:40,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 551 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:30:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 12:30:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-12-14 12:30:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0724637681159421) internal successors, (148), 138 states have internal predecessors, (148), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:30:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 193 transitions. [2022-12-14 12:30:40,828 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 193 transitions. Word has length 109 [2022-12-14 12:30:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:40,828 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 193 transitions. [2022-12-14 12:30:40,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 12:30:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 193 transitions. [2022-12-14 12:30:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 12:30:40,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:40,829 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1] [2022-12-14 12:30:40,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 12:30:41,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:41,031 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash -365474156, now seen corresponding path program 13 times [2022-12-14 12:30:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768024935] [2022-12-14 12:30:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:41,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:41,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729489167] [2022-12-14 12:30:41,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:30:41,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:41,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:41,060 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:41,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 12:30:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 12:30:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 66 proven. 365 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-14 12:30:41,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:45,542 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:31:05,588 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_210| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_210|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| 3)) 4) 0)))) is different from true [2022-12-14 12:31:23,628 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_210| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_210|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_299| 3)) 4) 0)))) is different from true [2022-12-14 12:31:31,668 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:31:33,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768024935] [2022-12-14 12:31:33,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:31:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729489167] [2022-12-14 12:31:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729489167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1118296691] [2022-12-14 12:31:33,690 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:31:33,690 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:33,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:33,690 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:33,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:33,906 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:31:33,951 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:35,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9667#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:35,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:35,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:31:35,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-12-14 12:31:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915797639] [2022-12-14 12:31:35,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:35,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 12:31:35,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 12:31:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=973, Unknown=4, NotChecked=260, Total=1332 [2022-12-14 12:31:35,021 INFO L87 Difference]: Start difference. First operand 184 states and 193 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 12:31:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:35,469 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2022-12-14 12:31:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 12:31:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 117 [2022-12-14 12:31:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:35,470 INFO L225 Difference]: With dead ends: 189 [2022-12-14 12:31:35,470 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 12:31:35,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=116, Invalid=1156, Unknown=4, NotChecked=284, Total=1560 [2022-12-14 12:31:35,471 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:35,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 590 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:31:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 12:31:35,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-12-14 12:31:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.065217391304348) internal successors, (147), 138 states have internal predecessors, (147), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:31:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2022-12-14 12:31:35,484 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 117 [2022-12-14 12:31:35,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:35,484 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2022-12-14 12:31:35,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 12:31:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2022-12-14 12:31:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 12:31:35,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:35,485 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1] [2022-12-14 12:31:35,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 12:31:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:35,687 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1438596858, now seen corresponding path program 14 times [2022-12-14 12:31:35,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:35,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167064135] [2022-12-14 12:31:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:35,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:35,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:31:35,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950969112] [2022-12-14 12:31:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:31:35,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:35,721 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:35,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 12:31:37,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 12:31:37,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:31:37,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-14 12:31:37,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 44 proven. 448 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-14 12:31:37,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:37,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167064135] [2022-12-14 12:31:37,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:31:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950969112] [2022-12-14 12:31:37,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950969112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054055999] [2022-12-14 12:31:37,842 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:31:37,842 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:37,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:37,842 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:37,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:38,067 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:31:38,108 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:41,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10635#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:41,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:41,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:31:41,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-12-14 12:31:41,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786639301] [2022-12-14 12:31:41,319 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:41,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:31:41,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:41,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:31:41,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:31:41,320 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 12:31:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:41,907 INFO L93 Difference]: Finished difference Result 189 states and 196 transitions. [2022-12-14 12:31:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:31:41,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 125 [2022-12-14 12:31:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:41,908 INFO L225 Difference]: With dead ends: 189 [2022-12-14 12:31:41,908 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 12:31:41,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 12:31:41,909 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:41,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 693 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:31:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 12:31:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-12-14 12:31:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0579710144927537) internal successors, (146), 138 states have internal predecessors, (146), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:31:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2022-12-14 12:31:41,922 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 125 [2022-12-14 12:31:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:41,922 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2022-12-14 12:31:41,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 12:31:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2022-12-14 12:31:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 12:31:41,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:41,922 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1] [2022-12-14 12:31:41,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 12:31:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 12:31:42,124 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2053412512, now seen corresponding path program 15 times [2022-12-14 12:31:42,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:42,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22966920] [2022-12-14 12:31:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:42,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:31:42,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839526865] [2022-12-14 12:31:42,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:31:42,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:42,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:42,154 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:42,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 12:31:42,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:31:42,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:31:42,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 12:31:42,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 37 proven. 520 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-12-14 12:31:42,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:43,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:43,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22966920] [2022-12-14 12:31:43,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:31:43,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839526865] [2022-12-14 12:31:43,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839526865] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:43,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1112283634] [2022-12-14 12:31:43,085 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:31:43,085 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:43,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:43,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:43,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:43,284 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:31:43,331 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:44,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11628#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 12:31:44,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:44,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:31:44,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-12-14 12:31:44,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126589557] [2022-12-14 12:31:44,106 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:44,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 12:31:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 12:31:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 12:31:44,107 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 12:31:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:44,731 INFO L93 Difference]: Finished difference Result 189 states and 195 transitions. [2022-12-14 12:31:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:31:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 133 [2022-12-14 12:31:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:44,732 INFO L225 Difference]: With dead ends: 189 [2022-12-14 12:31:44,732 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 12:31:44,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:31:44,733 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:44,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 736 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:31:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 12:31:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-12-14 12:31:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0507246376811594) internal successors, (145), 138 states have internal predecessors, (145), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:31:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2022-12-14 12:31:44,742 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 133 [2022-12-14 12:31:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:44,743 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2022-12-14 12:31:44,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 12:31:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2022-12-14 12:31:44,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 12:31:44,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:44,743 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1] [2022-12-14 12:31:44,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 12:31:44,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:44,945 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:44,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1727122886, now seen corresponding path program 16 times [2022-12-14 12:31:44,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:44,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606247731] [2022-12-14 12:31:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:44,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:44,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:31:44,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011002757] [2022-12-14 12:31:44,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:31:44,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:44,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:44,975 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:44,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 12:31:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:45,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-14 12:31:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 81 proven. 545 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-12-14 12:31:45,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:26,162 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_264| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_264|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| 2)) 4) 0)))) is different from true [2022-12-14 12:32:44,402 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_264| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_264|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_383| 2)) 4) 0)))) is different from true [2022-12-14 12:32:52,436 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:33:02,497 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:33:12,561 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 6) 9) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 3 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:34:00,934 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 25) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 5 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:34:10,990 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 12) 36) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 6 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:34:21,048 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 49 (* |c_ULTIMATE.start_main_~y~0#1| 14)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 7 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:35:41,359 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 20) 100) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 10 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:35:51,434 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 11 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 22) 121)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:36:02,032 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 12) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 24) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 144) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 12 |c_ULTIMATE.start_main_~k~0#1|))) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:36:12,094 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 13 |c_ULTIMATE.start_main_~k~0#1|)) (+ 169 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 26))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 13) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 12) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:36:22,556 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ 196 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 28)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 14 |c_ULTIMATE.start_main_~k~0#1|))) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 13) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 14) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:36:59,062 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 16) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 15)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 256 (* |c_ULTIMATE.start_main_~y~0#1| 32)) (+ (* 16 |ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:37:01,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:37:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606247731] [2022-12-14 12:37:01,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:37:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011002757] [2022-12-14 12:37:01,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011002757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:37:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731519232] [2022-12-14 12:37:01,084 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:37:01,084 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:37:01,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:37:01,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:37:01,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:37:01,300 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:37:01,341 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:37:04,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13024#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:37:04,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:37:04,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:37:04,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-12-14 12:37:04,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655266795] [2022-12-14 12:37:04,572 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:37:04,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 12:37:04,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:37:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 12:37:04,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1451, Unknown=39, NotChecked=1274, Total=2970 [2022-12-14 12:37:04,574 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 12:37:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:37:05,259 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2022-12-14 12:37:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:37:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 141 [2022-12-14 12:37:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:37:05,260 INFO L225 Difference]: With dead ends: 189 [2022-12-14 12:37:05,260 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 12:37:05,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 156.6s TimeCoverageRelationStatistics Valid=228, Invalid=1681, Unknown=39, NotChecked=1358, Total=3306 [2022-12-14 12:37:05,261 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:37:05,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 815 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:37:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 12:37:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-12-14 12:37:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0434782608695652) internal successors, (144), 138 states have internal predecessors, (144), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 12:37:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 189 transitions. [2022-12-14 12:37:05,278 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 189 transitions. Word has length 141 [2022-12-14 12:37:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:37:05,278 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 189 transitions. [2022-12-14 12:37:05,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 12:37:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 189 transitions. [2022-12-14 12:37:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 12:37:05,279 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:37:05,279 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1] [2022-12-14 12:37:05,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 12:37:05,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 12:37:05,481 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:37:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:37:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1625844780, now seen corresponding path program 17 times [2022-12-14 12:37:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:37:05,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913863614] [2022-12-14 12:37:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:37:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:37:05,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:37:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929319759] [2022-12-14 12:37:05,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:37:05,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:37:05,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:37:05,511 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:37:05,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2981295-9252-499d-baea-bf66c68a7009/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 12:37:05,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 12:37:05,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:37:05,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 12:37:05,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:37:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 62 proven. 637 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-12-14 12:37:06,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:37:11,146 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 8 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 64 (* |c_ULTIMATE.start_main_~y~0#1| 16))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:37:28,009 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_315| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| 2)) 4) 0) (= (+ 64 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| 16)) (+ (* 8 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_315|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_315|)))))) is different from true [2022-12-14 12:37:46,058 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_315| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| 2)) 4) 0) (= (+ 64 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| 16)) (+ (* 8 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_315|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_436| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_315|))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-14 12:38:30,031 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 20) 100) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 10 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:38:40,104 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 11 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 22) 121)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:38:50,178 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 12) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 24) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 144) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 12 |c_ULTIMATE.start_main_~k~0#1|))) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:39:00,252 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 13 |c_ULTIMATE.start_main_~k~0#1|)) (+ 169 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 26))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 13) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 12) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:39:11,000 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ 196 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 28)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 14 |c_ULTIMATE.start_main_~k~0#1|))) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 13) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 14) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:39:21,065 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 14) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 15 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 30) 225)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 15) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:39:31,133 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 16) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 15)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 256 (* |c_ULTIMATE.start_main_~y~0#1| 32)) (+ (* 16 |ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-12-14 12:39:33,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:39:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913863614] [2022-12-14 12:39:33,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:39:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929319759] [2022-12-14 12:39:33,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929319759] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:39:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176001600] [2022-12-14 12:39:33,463 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:39:33,463 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:39:33,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:39:33,463 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:39:33,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:39:33,656 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 62 for LOIs [2022-12-14 12:39:33,696 INFO L180 IcfgInterpreter]: Interpretation finished