./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur --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 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- 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-38b53e6 [2022-11-25 23:32:29,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:32:29,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:32:29,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:32:29,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:32:29,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:32:29,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:32:29,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:32:29,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:32:29,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:32:29,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:32:29,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:32:29,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:32:29,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:32:29,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:32:29,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:32:29,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:32:29,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:32:29,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:32:29,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:32:29,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:32:29,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:32:29,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:32:29,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:32:29,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:32:29,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:32:29,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:32:29,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:32:29,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:32:29,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:32:29,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:32:29,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:32:29,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:32:29,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:32:29,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:32:29,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:32:29,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:32:29,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:32:29,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:32:29,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:32:29,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:32:29,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:32:29,792 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:32:29,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:32:29,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:32:29,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:32:29,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:32:29,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:32:29,797 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:32:29,797 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:32:29,798 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:32:29,798 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:32:29,800 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:32:29,800 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:32:29,801 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:32:29,801 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:32:29,802 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:32:29,802 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:32:29,802 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:32:29,803 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:32:29,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:32:29,804 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:32:29,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:32:29,805 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:32:29,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:32:29,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:32:29,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:32:29,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:32:29,808 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:32:29,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:32:29,809 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:32:29,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:32:29,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:32:29,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:32:29,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:32:29,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:32:29,812 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:32:29,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:32:29,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:32:29,813 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:32:29,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:32:29,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:32:29,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:32:29,814 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_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2022-11-25 23:32:30,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:32:30,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:32:30,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:32:30,259 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:32:30,260 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:32:30,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-11-25 23:32:34,142 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:32:34,395 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:32:34,396 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-11-25 23:32:34,404 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/data/f6e9ded78/4551463b8fb2405badbb86f97873ebf2/FLAGcabb393e8 [2022-11-25 23:32:34,423 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/data/f6e9ded78/4551463b8fb2405badbb86f97873ebf2 [2022-11-25 23:32:34,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:32:34,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:32:34,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:32:34,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:32:34,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:32:34,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c4dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34, skipping insertion in model container [2022-11-25 23:32:34,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:32:34,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:32:34,671 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_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2022-11-25 23:32:34,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:32:34,716 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:32:34,736 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_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2022-11-25 23:32:34,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:32:34,784 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:32:34,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34 WrapperNode [2022-11-25 23:32:34,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:32:34,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:32:34,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:32:34,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:32:34,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,854 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-11-25 23:32:34,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:32:34,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:32:34,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:32:34,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:32:34,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,880 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:32:34,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:32:34,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:32:34,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:32:34,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (1/1) ... [2022-11-25 23:32:34,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:32:34,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:34,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:32:34,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:32:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:32:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 23:32:34,995 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 23:32:34,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:32:34,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:32:34,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:32:34,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:32:34,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:32:35,111 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:32:35,115 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:32:35,473 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:32:35,534 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:32:35,540 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:32:35,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:35 BoogieIcfgContainer [2022-11-25 23:32:35,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:32:35,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:32:35,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:32:35,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:32:35,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:32:34" (1/3) ... [2022-11-25 23:32:35,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd09724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:32:35, skipping insertion in model container [2022-11-25 23:32:35,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:34" (2/3) ... [2022-11-25 23:32:35,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd09724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:32:35, skipping insertion in model container [2022-11-25 23:32:35,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:35" (3/3) ... [2022-11-25 23:32:35,577 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2022-11-25 23:32:35,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:32:35,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:32:35,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:32:35,674 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;@47ba7462, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:32:35,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:32:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 23:32:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 23:32:35,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:35,690 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:35,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2133247598, now seen corresponding path program 1 times [2022-11-25 23:32:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:35,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841576762] [2022-11-25 23:32:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:35,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:35,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724798674] [2022-11-25 23:32:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:35,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:35,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:35,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:35,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:32:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 23:32:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:32:36,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:36,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:36,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841576762] [2022-11-25 23:32:36,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724798674] [2022-11-25 23:32:36,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724798674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:36,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:36,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:32:36,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991399683] [2022-11-25 23:32:36,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:36,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:32:36,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:32:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:32:36,079 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:32:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:36,137 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2022-11-25 23:32:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:32:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2022-11-25 23:32:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:36,151 INFO L225 Difference]: With dead ends: 50 [2022-11-25 23:32:36,152 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 23:32:36,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:32:36,161 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:36,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:32:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 23:32:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 23:32:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-11-25 23:32:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-11-25 23:32:36,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2022-11-25 23:32:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:36,235 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-11-25 23:32:36,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:32:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-11-25 23:32:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 23:32:36,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:36,237 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:36,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:36,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:36,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash 635683218, now seen corresponding path program 1 times [2022-11-25 23:32:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:36,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404958115] [2022-11-25 23:32:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:36,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:36,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755620398] [2022-11-25 23:32:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:36,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:36,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:36,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:36,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:32:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:32:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:32:36,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:36,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:36,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404958115] [2022-11-25 23:32:36,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:36,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755620398] [2022-11-25 23:32:36,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755620398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:36,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:36,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:36,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50121832] [2022-11-25 23:32:36,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:36,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:32:36,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:32:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:32:36,739 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:32:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:36,770 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-11-25 23:32:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:32:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-11-25 23:32:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:36,787 INFO L225 Difference]: With dead ends: 37 [2022-11-25 23:32:36,788 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 23:32:36,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:32:36,790 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:36,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:32:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 23:32:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-25 23:32:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 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) [2022-11-25 23:32:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-11-25 23:32:36,810 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2022-11-25 23:32:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:36,812 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-11-25 23:32:36,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:32:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-11-25 23:32:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:32:36,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:36,816 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:36,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 23:32:37,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:37,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1775243410, now seen corresponding path program 1 times [2022-11-25 23:32:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:37,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161394415] [2022-11-25 23:32:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:37,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:37,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:37,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745293913] [2022-11-25 23:32:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:37,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:37,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:37,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:32:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:32:37,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:32:37,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:32:37,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:37,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161394415] [2022-11-25 23:32:37,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:37,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745293913] [2022-11-25 23:32:37,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745293913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:32:37,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530622972] [2022-11-25 23:32:37,344 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-25 23:32:37,344 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:37,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:32:37,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:32:37,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:38,537 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:32:38,586 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:32:41,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1530622972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:41,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:32:41,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5] total 15 [2022-11-25 23:32:41,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648564572] [2022-11-25 23:32:41,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:41,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:32:41,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:32:41,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:32:41,150 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:32:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:41,646 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-25 23:32:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:32:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-11-25 23:32:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:41,649 INFO L225 Difference]: With dead ends: 38 [2022-11-25 23:32:41,649 INFO L226 Difference]: Without dead ends: 30 [2022-11-25 23:32:41,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:32:41,651 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:41,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:32:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-25 23:32:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-25 23:32:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 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) [2022-11-25 23:32:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-25 23:32:41,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2022-11-25 23:32:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:41,678 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-25 23:32:41,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 23:32:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-25 23:32:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:32:41,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:41,680 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:41,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:41,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:41,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:41,889 INFO L85 PathProgramCache]: Analyzing trace with hash -963684835, now seen corresponding path program 1 times [2022-11-25 23:32:41,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:41,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303249524] [2022-11-25 23:32:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:41,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:41,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:41,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092144886] [2022-11-25 23:32:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:41,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:41,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:32:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:32:42,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:32:42,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:32:42,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303249524] [2022-11-25 23:32:42,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092144886] [2022-11-25 23:32:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092144886] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:42,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:32:42,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-25 23:32:42,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73581770] [2022-11-25 23:32:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:42,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:42,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:42,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:32:42,194 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:32:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:42,274 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-25 23:32:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:32:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2022-11-25 23:32:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:42,276 INFO L225 Difference]: With dead ends: 36 [2022-11-25 23:32:42,277 INFO L226 Difference]: Without dead ends: 34 [2022-11-25 23:32:42,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:32:42,278 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:42,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 95 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:32:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-25 23:32:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-25 23:32:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 23:32:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-25 23:32:42,295 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 23 [2022-11-25 23:32:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:42,295 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-25 23:32:42,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:32:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-25 23:32:42,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 23:32:42,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:42,297 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:42,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:42,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash -748532437, now seen corresponding path program 1 times [2022-11-25 23:32:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:42,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257675255] [2022-11-25 23:32:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:42,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339047229] [2022-11-25 23:32:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:42,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:42,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:42,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:42,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:32:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:32:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:32:42,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:42,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257675255] [2022-11-25 23:32:42,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339047229] [2022-11-25 23:32:42,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339047229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:42,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:42,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:32:42,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889756796] [2022-11-25 23:32:42,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:42,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:42,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:42,665 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:32:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:42,701 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-11-25 23:32:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:32:42,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2022-11-25 23:32:42,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:42,703 INFO L225 Difference]: With dead ends: 59 [2022-11-25 23:32:42,703 INFO L226 Difference]: Without dead ends: 36 [2022-11-25 23:32:42,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:42,705 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:42,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:32:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-25 23:32:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-25 23:32:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 23:32:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-25 23:32:42,722 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 26 [2022-11-25 23:32:42,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:42,727 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-25 23:32:42,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:32:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-25 23:32:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:32:42,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:42,730 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:42,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:42,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:42,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash 47389219, now seen corresponding path program 1 times [2022-11-25 23:32:42,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:42,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538317204] [2022-11-25 23:32:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:42,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:42,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:42,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504433331] [2022-11-25 23:32:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:42,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:42,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:32:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:43,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:32:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:32:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:32:43,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538317204] [2022-11-25 23:32:43,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:43,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504433331] [2022-11-25 23:32:43,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504433331] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:43,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:32:43,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-25 23:32:43,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600619937] [2022-11-25 23:32:43,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:43,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:43,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:43,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:32:43,533 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:32:43,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:43,642 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-11-25 23:32:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:32:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-11-25 23:32:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:43,646 INFO L225 Difference]: With dead ends: 50 [2022-11-25 23:32:43,646 INFO L226 Difference]: Without dead ends: 48 [2022-11-25 23:32:43,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:32:43,650 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:43,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:32:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-25 23:32:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-25 23:32:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:32:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-11-25 23:32:43,695 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 28 [2022-11-25 23:32:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:43,696 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-11-25 23:32:43,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:32:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-11-25 23:32:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 23:32:43,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:43,701 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:43,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:43,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:43,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2024014237, now seen corresponding path program 1 times [2022-11-25 23:32:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:43,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285551392] [2022-11-25 23:32:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:43,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:43,950 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:43,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450439330] [2022-11-25 23:32:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:43,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:43,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:32:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:44,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:32:44,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:32:44,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:32:44,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:44,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285551392] [2022-11-25 23:32:44,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:44,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450439330] [2022-11-25 23:32:44,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450439330] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:44,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:32:44,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-11-25 23:32:44,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662515188] [2022-11-25 23:32:44,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:44,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:44,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:32:44,531 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:32:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:44,648 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-11-25 23:32:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:32:44,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2022-11-25 23:32:44,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:44,655 INFO L225 Difference]: With dead ends: 54 [2022-11-25 23:32:44,655 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 23:32:44,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:32:44,660 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:44,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 112 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:32:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 23:32:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-25 23:32:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:32:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-11-25 23:32:44,694 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 33 [2022-11-25 23:32:44,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:44,695 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-11-25 23:32:44,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:32:44,695 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-11-25 23:32:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 23:32:44,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:44,699 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:44,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:44,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:44,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:32:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:44,908 INFO L85 PathProgramCache]: Analyzing trace with hash 613928483, now seen corresponding path program 1 times [2022-11-25 23:32:44,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:44,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713644816] [2022-11-25 23:32:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:44,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:32:44,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959779447] [2022-11-25 23:32:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:44,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:44,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:44,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:44,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:32:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:45,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:32:45,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 23:32:45,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:45,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:45,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713644816] [2022-11-25 23:32:45,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:32:45,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959779447] [2022-11-25 23:32:45,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959779447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:45,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965464682] [2022-11-25 23:32:45,386 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:32:45,387 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:45,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:32:45,387 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:32:45,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:32:47,136 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-25 23:32:47,149 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:32:47,172 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:33:07,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [965464682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:07,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:33:07,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7] total 22 [2022-11-25 23:33:07,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518386375] [2022-11-25 23:33:07,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:07,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:33:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:07,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:33:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:33:07,660 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 23:33:08,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:08,902 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-25 23:33:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:33:08,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 38 [2022-11-25 23:33:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:08,905 INFO L225 Difference]: With dead ends: 75 [2022-11-25 23:33:08,905 INFO L226 Difference]: Without dead ends: 73 [2022-11-25 23:33:08,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:33:08,907 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:08,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 117 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 23:33:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-25 23:33:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-25 23:33:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 23:33:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-11-25 23:33:08,934 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 38 [2022-11-25 23:33:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:08,935 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-11-25 23:33:08,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 23:33:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-11-25 23:33:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 23:33:08,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:08,937 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:08,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:09,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:09,145 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:33:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash 55138950, now seen corresponding path program 1 times [2022-11-25 23:33:09,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:09,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960771974] [2022-11-25 23:33:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:09,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:09,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:33:09,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489609472] [2022-11-25 23:33:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:09,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:09,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:09,180 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:09,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:33:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:33:09,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:33:09,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:33:09,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960771974] [2022-11-25 23:33:09,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:33:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489609472] [2022-11-25 23:33:09,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489609472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:09,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424427660] [2022-11-25 23:33:09,521 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:33:09,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:09,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:33:09,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:33:09,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:33:24,757 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2022-11-25 23:33:24,763 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:33:24,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:33:36,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1424427660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:36,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:33:36,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [5, 6] total 26 [2022-11-25 23:33:36,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861446270] [2022-11-25 23:33:36,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:36,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:33:36,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:36,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:33:36,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:33:36,519 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 23:33:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:40,698 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-11-25 23:33:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:33:40,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-11-25 23:33:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:40,700 INFO L225 Difference]: With dead ends: 114 [2022-11-25 23:33:40,700 INFO L226 Difference]: Without dead ends: 91 [2022-11-25 23:33:40,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:33:40,702 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:40,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 121 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-25 23:33:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-25 23:33:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-25 23:33:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-25 23:33:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-11-25 23:33:40,739 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 47 [2022-11-25 23:33:40,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:40,740 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-11-25 23:33:40,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 23:33:40,740 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-11-25 23:33:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:33:40,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:40,742 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:40,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:40,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 23:33:40,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:33:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:40,950 INFO L85 PathProgramCache]: Analyzing trace with hash -885230527, now seen corresponding path program 1 times [2022-11-25 23:33:40,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:40,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306796764] [2022-11-25 23:33:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:40,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:40,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:33:40,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852310984] [2022-11-25 23:33:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:40,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:40,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:40,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:33:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:33:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:33:41,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:33:41,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306796764] [2022-11-25 23:33:41,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:33:41,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852310984] [2022-11-25 23:33:41,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852310984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:41,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106532975] [2022-11-25 23:33:41,261 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:33:41,261 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:41,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:33:41,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:33:41,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:34:00,339 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-25 23:34:00,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:34:00,361 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:34:12,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3003#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:34:12,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:34:12,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:34:12,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-25 23:34:12,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392854988] [2022-11-25 23:34:12,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:12,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:34:12,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:34:12,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:34:12,469 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 23:34:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:12,834 INFO L93 Difference]: Finished difference Result 239 states and 287 transitions. [2022-11-25 23:34:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:34:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 49 [2022-11-25 23:34:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:12,844 INFO L225 Difference]: With dead ends: 239 [2022-11-25 23:34:12,844 INFO L226 Difference]: Without dead ends: 216 [2022-11-25 23:34:12,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:34:12,851 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 70 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:12,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 197 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:34:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-25 23:34:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 202. [2022-11-25 23:34:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 133 states have internal predecessors, (151), 46 states have call successors, (46), 25 states have call predecessors, (46), 25 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-25 23:34:12,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-11-25 23:34:12,935 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 49 [2022-11-25 23:34:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:12,937 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-11-25 23:34:12,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-25 23:34:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-11-25 23:34:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 23:34:12,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:12,942 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:12,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:13,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:34:13,143 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1699609543, now seen corresponding path program 1 times [2022-11-25 23:34:13,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:13,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36340096] [2022-11-25 23:34:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:13,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:34:13,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904230197] [2022-11-25 23:34:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:13,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:13,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:13,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:13,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:34:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:34:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-25 23:34:13,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-25 23:34:13,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:13,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36340096] [2022-11-25 23:34:13,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:34:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904230197] [2022-11-25 23:34:13,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904230197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [566028167] [2022-11-25 23:34:13,529 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:34:13,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:13,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:34:13,530 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:34:13,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:34:20,310 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-25 23:34:20,316 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:34:20,333 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:34:32,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4033#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:34:32,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:34:32,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:34:32,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-25 23:34:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509897338] [2022-11-25 23:34:32,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:32,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:34:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:34:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:34:32,297 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-25 23:34:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:32,852 INFO L93 Difference]: Finished difference Result 231 states and 277 transitions. [2022-11-25 23:34:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:34:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 61 [2022-11-25 23:34:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:32,856 INFO L225 Difference]: With dead ends: 231 [2022-11-25 23:34:32,856 INFO L226 Difference]: Without dead ends: 229 [2022-11-25 23:34:32,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:34:32,858 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:32,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 76 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:34:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-25 23:34:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-11-25 23:34:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 145 states have (on average 1.1448275862068966) internal successors, (166), 150 states have internal predecessors, (166), 54 states have call successors, (54), 28 states have call predecessors, (54), 28 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-25 23:34:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 271 transitions. [2022-11-25 23:34:32,927 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 271 transitions. Word has length 61 [2022-11-25 23:34:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:32,928 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 271 transitions. [2022-11-25 23:34:32,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-25 23:34:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 271 transitions. [2022-11-25 23:34:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 23:34:32,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:32,932 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:34:32,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 23:34:33,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:33,140 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:34:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1184603440, now seen corresponding path program 1 times [2022-11-25 23:34:33,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:33,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297151253] [2022-11-25 23:34:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:33,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:33,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:34:33,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006157003] [2022-11-25 23:34:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:33,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:33,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:33,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:33,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:34:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:33,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:34:33,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 23:34:33,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-25 23:34:33,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297151253] [2022-11-25 23:34:33,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:34:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006157003] [2022-11-25 23:34:33,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006157003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:33,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840271045] [2022-11-25 23:34:33,506 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:34:33,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:33,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:34:33,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:34:33,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:01,741 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-25 23:35:01,746 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:35:01,773 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:07,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5147#(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 [2022-11-25 23:35:07,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:07,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:35:07,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-25 23:35:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683873851] [2022-11-25 23:35:07,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:35:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:07,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:35:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:35:07,793 INFO L87 Difference]: Start difference. First operand 228 states and 271 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-25 23:35:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:08,201 INFO L93 Difference]: Finished difference Result 372 states and 446 transitions. [2022-11-25 23:35:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:35:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 70 [2022-11-25 23:35:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:08,205 INFO L225 Difference]: With dead ends: 372 [2022-11-25 23:35:08,206 INFO L226 Difference]: Without dead ends: 352 [2022-11-25 23:35:08,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:35:08,208 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 94 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:08,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 288 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:35:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-25 23:35:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 336. [2022-11-25 23:35:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 209 states have (on average 1.1483253588516746) internal successors, (240), 218 states have internal predecessors, (240), 86 states have call successors, (86), 40 states have call predecessors, (86), 40 states have return successors, (81), 77 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-25 23:35:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 407 transitions. [2022-11-25 23:35:08,287 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 407 transitions. Word has length 70 [2022-11-25 23:35:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:08,288 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 407 transitions. [2022-11-25 23:35:08,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-25 23:35:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 407 transitions. [2022-11-25 23:35:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-25 23:35:08,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:08,290 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:08,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:08,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:35:08,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1938585712, now seen corresponding path program 1 times [2022-11-25 23:35:08,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:08,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062584390] [2022-11-25 23:35:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:08,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:08,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:35:08,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326781265] [2022-11-25 23:35:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:08,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:08,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:08,510 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:08,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:35:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 23:35:08,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-25 23:35:09,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-25 23:35:10,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:10,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062584390] [2022-11-25 23:35:10,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:35:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326781265] [2022-11-25 23:35:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326781265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:10,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104151295] [2022-11-25 23:35:10,259 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:35:10,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:10,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:10,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:10,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:22,755 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-25 23:35:22,758 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:35:22,776 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:29,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6651#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:29,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:29,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:35:29,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-11-25 23:35:29,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247953486] [2022-11-25 23:35:29,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:29,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:35:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:35:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 23:35:29,650 INFO L87 Difference]: Start difference. First operand 336 states and 407 transitions. Second operand has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-25 23:35:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:46,736 INFO L93 Difference]: Finished difference Result 458 states and 584 transitions. [2022-11-25 23:35:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:35:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 71 [2022-11-25 23:35:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:46,740 INFO L225 Difference]: With dead ends: 458 [2022-11-25 23:35:46,740 INFO L226 Difference]: Without dead ends: 454 [2022-11-25 23:35:46,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=512, Invalid=3520, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 23:35:46,743 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 186 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:46,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 564 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-25 23:35:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-25 23:35:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 424. [2022-11-25 23:35:46,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 266 states have (on average 1.1879699248120301) internal successors, (316), 274 states have internal predecessors, (316), 113 states have call successors, (113), 45 states have call predecessors, (113), 44 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-25 23:35:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 537 transitions. [2022-11-25 23:35:46,886 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 537 transitions. Word has length 71 [2022-11-25 23:35:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:46,888 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 537 transitions. [2022-11-25 23:35:46,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-25 23:35:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 537 transitions. [2022-11-25 23:35:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 23:35:46,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:46,889 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:46,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:47,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:35:47,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1382598768, now seen corresponding path program 1 times [2022-11-25 23:35:47,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:47,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990409357] [2022-11-25 23:35:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:47,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:47,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:35:47,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047777026] [2022-11-25 23:35:47,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:47,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:47,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:47,110 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:47,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:35:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:47,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:35:47,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 35 proven. 20 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-25 23:35:47,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-25 23:35:48,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990409357] [2022-11-25 23:35:48,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:35:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047777026] [2022-11-25 23:35:48,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047777026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:48,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159528772] [2022-11-25 23:35:48,084 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-25 23:35:48,084 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:48,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:48,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:48,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:01,009 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-25 23:36:01,013 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:36:01,032 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:06,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8479#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:06,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:06,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:36:06,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-25 23:36:06,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934156134] [2022-11-25 23:36:06,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:06,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:36:06,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:06,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:36:06,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:36:06,149 INFO L87 Difference]: Start difference. First operand 424 states and 537 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-25 23:36:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:12,650 INFO L93 Difference]: Finished difference Result 556 states and 710 transitions. [2022-11-25 23:36:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:36:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 76 [2022-11-25 23:36:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:12,655 INFO L225 Difference]: With dead ends: 556 [2022-11-25 23:36:12,655 INFO L226 Difference]: Without dead ends: 522 [2022-11-25 23:36:12,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 23:36:12,658 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 98 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:12,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 268 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-25 23:36:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-25 23:36:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 453. [2022-11-25 23:36:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 293 states have (on average 1.174061433447099) internal successors, (344), 300 states have internal predecessors, (344), 109 states have call successors, (109), 50 states have call predecessors, (109), 50 states have return successors, (105), 102 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-25 23:36:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 558 transitions. [2022-11-25 23:36:12,860 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 558 transitions. Word has length 76 [2022-11-25 23:36:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:12,861 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 558 transitions. [2022-11-25 23:36:12,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-11-25 23:36:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 558 transitions. [2022-11-25 23:36:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 23:36:12,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:12,863 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:12,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 23:36:13,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:36:13,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:13,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash -698925503, now seen corresponding path program 1 times [2022-11-25 23:36:13,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269819040] [2022-11-25 23:36:13,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:13,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:13,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:36:13,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116355736] [2022-11-25 23:36:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:13,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:13,084 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:13,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:36:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 23:36:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-11-25 23:36:14,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-11-25 23:36:19,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269819040] [2022-11-25 23:36:19,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:36:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116355736] [2022-11-25 23:36:19,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116355736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:19,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444820533] [2022-11-25 23:36:19,358 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:36:19,358 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:19,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:19,359 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:19,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:35,421 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-25 23:36:35,425 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:36:35,443 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:48,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10539#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:48,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:48,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:36:48,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-11-25 23:36:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334205106] [2022-11-25 23:36:48,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:48,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:36:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:36:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 23:36:48,815 INFO L87 Difference]: Start difference. First operand 453 states and 558 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-25 23:36:59,565 WARN L233 SmtUtils]: Spent 7.92s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:09,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:37:24,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:37:28,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:37:31,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:37:38,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.86s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:37:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:42,220 INFO L93 Difference]: Finished difference Result 584 states and 743 transitions. [2022-11-25 23:37:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:37:42,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 88 [2022-11-25 23:37:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:42,224 INFO L225 Difference]: With dead ends: 584 [2022-11-25 23:37:42,224 INFO L226 Difference]: Without dead ends: 582 [2022-11-25 23:37:42,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=520, Invalid=3140, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 23:37:42,226 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 128 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 127 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:42,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 259 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 918 Invalid, 3 Unknown, 0 Unchecked, 24.3s Time] [2022-11-25 23:37:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-11-25 23:37:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 554. [2022-11-25 23:37:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 362 states have (on average 1.1961325966850829) internal successors, (433), 370 states have internal predecessors, (433), 137 states have call successors, (137), 54 states have call predecessors, (137), 54 states have return successors, (133), 129 states have call predecessors, (133), 133 states have call successors, (133) [2022-11-25 23:37:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 703 transitions. [2022-11-25 23:37:42,593 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 703 transitions. Word has length 88 [2022-11-25 23:37:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:42,594 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 703 transitions. [2022-11-25 23:37:42,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-25 23:37:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 703 transitions. [2022-11-25 23:37:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 23:37:42,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:42,596 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:37:42,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-25 23:37:42,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:37:42,802 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:37:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1250044008, now seen corresponding path program 2 times [2022-11-25 23:37:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:37:42,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248089192] [2022-11-25 23:37:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:37:42,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:37:42,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475270739] [2022-11-25 23:37:42,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:37:42,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:42,815 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:42,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 23:37:42,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:37:42,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:37:42,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:37:42,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-25 23:37:42,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:37:42,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:42,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248089192] [2022-11-25 23:37:42,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:37:42,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475270739] [2022-11-25 23:37:42,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475270739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:37:42,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:37:42,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:37:42,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790313533] [2022-11-25 23:37:42,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:37:42,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:37:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:37:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:37:42,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:37:42,936 INFO L87 Difference]: Start difference. First operand 554 states and 703 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 23:37:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:43,291 INFO L93 Difference]: Finished difference Result 722 states and 935 transitions. [2022-11-25 23:37:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:37:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2022-11-25 23:37:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:43,297 INFO L225 Difference]: With dead ends: 722 [2022-11-25 23:37:43,297 INFO L226 Difference]: Without dead ends: 519 [2022-11-25 23:37:43,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:37:43,299 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:43,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:37:43,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-25 23:37:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 494. [2022-11-25 23:37:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 319 states have (on average 1.188087774294671) internal successors, (379), 327 states have internal predecessors, (379), 126 states have call successors, (126), 48 states have call predecessors, (126), 48 states have return successors, (123), 118 states have call predecessors, (123), 123 states have call successors, (123) [2022-11-25 23:37:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 628 transitions. [2022-11-25 23:37:43,544 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 628 transitions. Word has length 98 [2022-11-25 23:37:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:43,544 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 628 transitions. [2022-11-25 23:37:43,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-25 23:37:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 628 transitions. [2022-11-25 23:37:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-25 23:37:43,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:43,547 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:37:43,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:43,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 23:37:43,754 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:37:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1144504099, now seen corresponding path program 1 times [2022-11-25 23:37:43,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:37:43,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832486275] [2022-11-25 23:37:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:43,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:37:43,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:37:43,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741198393] [2022-11-25 23:37:43,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:43,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:43,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:43,796 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:43,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 23:37:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:43,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:37:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 35 proven. 229 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 23:37:44,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 35 proven. 37 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-25 23:37:44,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:44,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832486275] [2022-11-25 23:37:44,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:37:44,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741198393] [2022-11-25 23:37:44,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741198393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:44,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985078932] [2022-11-25 23:37:44,372 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:37:44,373 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:37:44,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:37:44,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:37:44,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:37:51,625 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2022-11-25 23:37:51,664 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:37:51,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:37:55,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14963#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:37:55,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:37:55,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:37:55,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-25 23:37:55,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744931539] [2022-11-25 23:37:55,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:37:55,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:37:55,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:37:55,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:37:55,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1013, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:37:55,506 INFO L87 Difference]: Start difference. First operand 494 states and 628 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-25 23:37:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:56,900 INFO L93 Difference]: Finished difference Result 1252 states and 1698 transitions. [2022-11-25 23:37:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 23:37:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 104 [2022-11-25 23:37:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:56,909 INFO L225 Difference]: With dead ends: 1252 [2022-11-25 23:37:56,909 INFO L226 Difference]: Without dead ends: 1132 [2022-11-25 23:37:56,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 255 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=505, Invalid=1847, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 23:37:56,912 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 204 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:56,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 365 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:37:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-11-25 23:37:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1108. [2022-11-25 23:37:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 691 states have (on average 1.1765557163531115) internal successors, (813), 708 states have internal predecessors, (813), 320 states have call successors, (320), 96 states have call predecessors, (320), 96 states have return successors, (311), 303 states have call predecessors, (311), 311 states have call successors, (311) [2022-11-25 23:37:57,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1444 transitions. [2022-11-25 23:37:57,520 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1444 transitions. Word has length 104 [2022-11-25 23:37:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:57,520 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1444 transitions. [2022-11-25 23:37:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-25 23:37:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1444 transitions. [2022-11-25 23:37:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 23:37:57,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:57,523 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:37:57,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:57,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 23:37:57,729 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:37:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:57,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1878404201, now seen corresponding path program 2 times [2022-11-25 23:37:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:37:57,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954382638] [2022-11-25 23:37:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:37:57,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:37:57,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618272679] [2022-11-25 23:37:57,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:37:57,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:57,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:57,742 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:57,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:37:58,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:37:58,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:37:58,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 23:37:58,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-11-25 23:37:58,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-11-25 23:37:59,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954382638] [2022-11-25 23:37:59,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:37:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618272679] [2022-11-25 23:37:59,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618272679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [493226292] [2022-11-25 23:37:59,942 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:37:59,942 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:37:59,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:37:59,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:37:59,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:38:12,983 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-25 23:38:12,987 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:38:13,004 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:38:19,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19164#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:38:19,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:38:19,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:38:19,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-11-25 23:38:19,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533978589] [2022-11-25 23:38:19,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:38:19,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:38:19,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:38:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 23:38:19,282 INFO L87 Difference]: Start difference. First operand 1108 states and 1444 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-25 23:38:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:38:42,482 INFO L93 Difference]: Finished difference Result 1688 states and 2278 transitions. [2022-11-25 23:38:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 23:38:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 106 [2022-11-25 23:38:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:38:42,492 INFO L225 Difference]: With dead ends: 1688 [2022-11-25 23:38:42,492 INFO L226 Difference]: Without dead ends: 1686 [2022-11-25 23:38:42,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 273 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=695, Invalid=4417, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 23:38:42,496 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 146 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:38:42,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 568 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-25 23:38:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-11-25 23:38:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1572. [2022-11-25 23:38:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 967 states have (on average 1.1985522233712513) internal successors, (1159), 984 states have internal predecessors, (1159), 480 states have call successors, (480), 124 states have call predecessors, (480), 124 states have return successors, (471), 463 states have call predecessors, (471), 471 states have call successors, (471) [2022-11-25 23:38:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2110 transitions. [2022-11-25 23:38:43,754 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2110 transitions. Word has length 106 [2022-11-25 23:38:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:43,755 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 2110 transitions. [2022-11-25 23:38:43,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-25 23:38:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2110 transitions. [2022-11-25 23:38:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-25 23:38:43,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:43,763 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:38:43,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:43,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 23:38:43,971 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:43,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1268150453, now seen corresponding path program 3 times [2022-11-25 23:38:43,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:43,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944445426] [2022-11-25 23:38:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:43,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:38:43,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:38:43,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784744703] [2022-11-25 23:38:43,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:38:43,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:38:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:38:43,997 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:38:44,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:38:44,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:38:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:38:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-25 23:38:44,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:38:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 57 proven. 59 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-11-25 23:38:45,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:38:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 65 proven. 48 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-25 23:38:47,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:38:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944445426] [2022-11-25 23:38:47,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:38:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784744703] [2022-11-25 23:38:47,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784744703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:38:47,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176217237] [2022-11-25 23:38:47,128 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:38:47,128 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:38:47,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:38:47,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:38:47,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:39:00,340 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-25 23:39:00,345 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:39:00,362 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:39:06,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24837#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:39:06,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:39:06,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:39:06,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2022-11-25 23:39:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582104664] [2022-11-25 23:39:06,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:39:06,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 23:39:06,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:39:06,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 23:39:06,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 23:39:06,331 INFO L87 Difference]: Start difference. First operand 1572 states and 2110 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-25 23:39:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:37,649 INFO L93 Difference]: Finished difference Result 1957 states and 2610 transitions. [2022-11-25 23:39:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 23:39:37,651 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) Word has length 110 [2022-11-25 23:39:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:37,662 INFO L225 Difference]: With dead ends: 1957 [2022-11-25 23:39:37,662 INFO L226 Difference]: Without dead ends: 1953 [2022-11-25 23:39:37,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=881, Invalid=5125, Unknown=0, NotChecked=0, Total=6006 [2022-11-25 23:39:37,666 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 239 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:37,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 299 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-11-25 23:39:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-11-25 23:39:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1837. [2022-11-25 23:39:39,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1145 states have (on average 1.1965065502183405) internal successors, (1370), 1166 states have internal predecessors, (1370), 535 states have call successors, (535), 157 states have call predecessors, (535), 156 states have return successors, (526), 513 states have call predecessors, (526), 526 states have call successors, (526) [2022-11-25 23:39:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 2431 transitions. [2022-11-25 23:39:39,283 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 2431 transitions. Word has length 110 [2022-11-25 23:39:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:39,284 INFO L495 AbstractCegarLoop]: Abstraction has 1837 states and 2431 transitions. [2022-11-25 23:39:39,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-25 23:39:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 2431 transitions. [2022-11-25 23:39:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-25 23:39:39,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:39,287 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:39,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:39,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:39,493 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:39:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:39,494 INFO L85 PathProgramCache]: Analyzing trace with hash -600095698, now seen corresponding path program 3 times [2022-11-25 23:39:39,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:39,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407302340] [2022-11-25 23:39:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:39,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:39,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:39:39,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619471414] [2022-11-25 23:39:39,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:39:39,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:39:39,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:39:39,511 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:39:39,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 23:39:39,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:39:39,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:39:39,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-25 23:39:39,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:39:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 32 proven. 55 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2022-11-25 23:39:40,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:39:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-11-25 23:39:43,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:39:43,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407302340] [2022-11-25 23:39:43,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:39:43,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619471414] [2022-11-25 23:39:43,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619471414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:39:43,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27827056] [2022-11-25 23:39:43,506 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:39:43,507 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:39:43,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:39:43,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:39:43,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:39:56,300 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2022-11-25 23:39:56,331 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:39:56,346 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:40:04,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31344#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:40:04,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:40:04,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:40:04,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2022-11-25 23:40:04,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693370156] [2022-11-25 23:40:04,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:40:04,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 23:40:04,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:40:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 23:40:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 23:40:04,978 INFO L87 Difference]: Start difference. First operand 1837 states and 2431 transitions. Second operand has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 14 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2022-11-25 23:41:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:16,409 INFO L93 Difference]: Finished difference Result 2196 states and 2931 transitions. [2022-11-25 23:41:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-25 23:41:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 14 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) Word has length 121 [2022-11-25 23:41:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:16,421 INFO L225 Difference]: With dead ends: 2196 [2022-11-25 23:41:16,421 INFO L226 Difference]: Without dead ends: 2161 [2022-11-25 23:41:16,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 294 SyntacticMatches, 22 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4269 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=1437, Invalid=8863, Unknown=2, NotChecked=0, Total=10302 [2022-11-25 23:41:16,426 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 302 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 2778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:16,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1074 Invalid, 2778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 31.6s Time] [2022-11-25 23:41:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2022-11-25 23:41:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2008. [2022-11-25 23:41:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 1252 states have (on average 1.1956869009584665) internal successors, (1497), 1272 states have internal predecessors, (1497), 583 states have call successors, (583), 173 states have call predecessors, (583), 172 states have return successors, (574), 562 states have call predecessors, (574), 574 states have call successors, (574) [2022-11-25 23:41:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 2654 transitions. [2022-11-25 23:41:17,895 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 2654 transitions. Word has length 121 [2022-11-25 23:41:17,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:17,896 INFO L495 AbstractCegarLoop]: Abstraction has 2008 states and 2654 transitions. [2022-11-25 23:41:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 14 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2022-11-25 23:41:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 2654 transitions. [2022-11-25 23:41:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-25 23:41:17,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:17,900 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:41:17,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:18,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:18,107 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:41:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1584885405, now seen corresponding path program 4 times [2022-11-25 23:41:18,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:41:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113057281] [2022-11-25 23:41:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:18,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:41:18,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:41:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543661232] [2022-11-25 23:41:18,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:41:18,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:18,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:18,134 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:18,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 23:41:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-25 23:41:20,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 131 proven. 89 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-25 23:41:29,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:39,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:39,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113057281] [2022-11-25 23:41:39,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:41:39,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543661232] [2022-11-25 23:41:39,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543661232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:39,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314466048] [2022-11-25 23:41:39,055 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:41:39,055 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:41:39,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:41:39,056 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:41:39,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:41:51,050 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-25 23:41:51,054 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:41:51,071 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:42:05,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38499#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:42:05,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:42:05,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:42:05,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-25 23:42:05,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724848993] [2022-11-25 23:42:05,508 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:42:05,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:42:05,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:05,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:42:05,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2377, Unknown=1, NotChecked=0, Total=2756 [2022-11-25 23:42:05,512 INFO L87 Difference]: Start difference. First operand 2008 states and 2654 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-25 23:42:07,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:42:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:15,749 INFO L93 Difference]: Finished difference Result 2085 states and 2714 transitions. [2022-11-25 23:42:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:42:15,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-11-25 23:42:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:15,761 INFO L225 Difference]: With dead ends: 2085 [2022-11-25 23:42:15,761 INFO L226 Difference]: Without dead ends: 2081 [2022-11-25 23:42:15,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=506, Invalid=3275, Unknown=1, NotChecked=0, Total=3782 [2022-11-25 23:42:15,765 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 66 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:15,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 404 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-25 23:42:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2022-11-25 23:42:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 2071. [2022-11-25 23:42:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1300 states have (on average 1.1876923076923076) internal successors, (1544), 1319 states have internal predecessors, (1544), 582 states have call successors, (582), 189 states have call predecessors, (582), 188 states have return successors, (574), 562 states have call predecessors, (574), 574 states have call successors, (574) [2022-11-25 23:42:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2700 transitions. [2022-11-25 23:42:17,253 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2700 transitions. Word has length 138 [2022-11-25 23:42:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:17,254 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 2700 transitions. [2022-11-25 23:42:17,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-25 23:42:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2700 transitions. [2022-11-25 23:42:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-25 23:42:17,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:17,258 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:17,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:42:17,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 23:42:17,469 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:17,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash 393851770, now seen corresponding path program 4 times [2022-11-25 23:42:17,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:17,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187031351] [2022-11-25 23:42:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:17,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:17,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:42:17,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501381439] [2022-11-25 23:42:17,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:42:17,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:42:17,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:42:17,484 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:42:17,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 23:42:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:17,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 23:42:17,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 40 proven. 76 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2022-11-25 23:42:18,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 40 proven. 73 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-11-25 23:42:20,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:20,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187031351] [2022-11-25 23:42:20,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:42:20,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501381439] [2022-11-25 23:42:20,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501381439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:20,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879003997] [2022-11-25 23:42:20,877 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:42:20,877 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:42:20,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:42:20,878 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:42:20,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:42:32,820 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-25 23:42:32,824 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:42:32,841 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:42:40,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45560#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:42:40,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:42:40,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:42:40,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2022-11-25 23:42:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047978075] [2022-11-25 23:42:40,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:42:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:42:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:42:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 23:42:40,353 INFO L87 Difference]: Start difference. First operand 2071 states and 2700 transitions. Second operand has 26 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2022-11-25 23:43:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:52,324 INFO L93 Difference]: Finished difference Result 2230 states and 2907 transitions. [2022-11-25 23:43:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 23:43:52,327 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) Word has length 140 [2022-11-25 23:43:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:52,336 INFO L225 Difference]: With dead ends: 2230 [2022-11-25 23:43:52,336 INFO L226 Difference]: Without dead ends: 2199 [2022-11-25 23:43:52,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 367 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2289 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=972, Invalid=6167, Unknown=1, NotChecked=0, Total=7140 [2022-11-25 23:43:52,339 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 220 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:52,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 931 Invalid, 2552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 32.3s Time] [2022-11-25 23:43:52,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2022-11-25 23:43:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2140. [2022-11-25 23:43:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 1340 states have (on average 1.1835820895522389) internal successors, (1586), 1359 states have internal predecessors, (1586), 605 states have call successors, (605), 194 states have call predecessors, (605), 194 states have return successors, (598), 586 states have call predecessors, (598), 598 states have call successors, (598) [2022-11-25 23:43:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2789 transitions. [2022-11-25 23:43:53,901 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2789 transitions. Word has length 140 [2022-11-25 23:43:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:53,902 INFO L495 AbstractCegarLoop]: Abstraction has 2140 states and 2789 transitions. [2022-11-25 23:43:53,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2022-11-25 23:43:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2789 transitions. [2022-11-25 23:43:53,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-25 23:43:53,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:53,906 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:53,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:54,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:54,113 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash 408986690, now seen corresponding path program 2 times [2022-11-25 23:43:54,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:43:54,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343743263] [2022-11-25 23:43:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:54,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:43:54,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:43:54,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48945806] [2022-11-25 23:43:54,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:43:54,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:54,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:54,128 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:54,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 23:43:54,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:43:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:54,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:43:54,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 40 proven. 728 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-25 23:43:54,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 40 proven. 88 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-11-25 23:43:54,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:43:54,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343743263] [2022-11-25 23:43:54,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:43:54,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48945806] [2022-11-25 23:43:54,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48945806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:54,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434019787] [2022-11-25 23:43:54,889 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-25 23:43:54,889 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:43:54,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:43:54,890 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:43:54,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:44:07,762 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-25 23:44:07,766 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:44:07,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:44:11,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53047#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:44:11,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:44:11,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:44:11,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2022-11-25 23:44:11,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350438277] [2022-11-25 23:44:11,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:11,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:44:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:44:11,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:44:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 23:44:11,951 INFO L87 Difference]: Start difference. First operand 2140 states and 2789 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-11-25 23:44:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:15,193 INFO L93 Difference]: Finished difference Result 3273 states and 4358 transitions. [2022-11-25 23:44:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 23:44:15,193 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) Word has length 147 [2022-11-25 23:44:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:15,208 INFO L225 Difference]: With dead ends: 3273 [2022-11-25 23:44:15,208 INFO L226 Difference]: Without dead ends: 3239 [2022-11-25 23:44:15,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=725, Invalid=2467, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 23:44:15,211 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 277 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:15,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 413 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:44:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2022-11-25 23:44:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 3178. [2022-11-25 23:44:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 1979 states have (on average 1.182920667003537) internal successors, (2341), 2017 states have internal predecessors, (2341), 924 states have call successors, (924), 274 states have call predecessors, (924), 274 states have return successors, (911), 886 states have call predecessors, (911), 911 states have call successors, (911) [2022-11-25 23:44:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4176 transitions. [2022-11-25 23:44:17,569 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4176 transitions. Word has length 147 [2022-11-25 23:44:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:17,570 INFO L495 AbstractCegarLoop]: Abstraction has 3178 states and 4176 transitions. [2022-11-25 23:44:17,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 13 states have call successors, (49), 8 states have call predecessors, (49), 7 states have return successors, (48), 12 states have call predecessors, (48), 12 states have call successors, (48) [2022-11-25 23:44:17,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4176 transitions. [2022-11-25 23:44:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-25 23:44:17,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:17,575 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:17,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:17,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 23:44:17,782 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:17,783 INFO L85 PathProgramCache]: Analyzing trace with hash 526567797, now seen corresponding path program 5 times [2022-11-25 23:44:17,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:44:17,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464075434] [2022-11-25 23:44:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:17,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:44:17,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:44:17,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060338763] [2022-11-25 23:44:17,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:44:17,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:17,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:17,795 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:17,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 23:44:18,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:44:18,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:18,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-25 23:44:18,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 166 proven. 98 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2022-11-25 23:44:24,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:29,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:44:29,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464075434] [2022-11-25 23:44:29,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:44:29,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060338763] [2022-11-25 23:44:29,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060338763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:44:29,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628386649] [2022-11-25 23:44:29,473 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:44:29,473 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:44:29,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:44:29,473 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:44:29,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:45:02,535 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-25 23:45:02,540 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-25 23:45:02,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:45:16,391 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 152 DAG size of output: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:45:40,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63435#(and (<= 2 ~counter~0) (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:45:40,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:45:40,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:45:40,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-25 23:45:40,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756277441] [2022-11-25 23:45:40,401 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:45:40,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:45:40,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:45:40,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:45:40,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2228, Unknown=4, NotChecked=0, Total=2550 [2022-11-25 23:45:40,403 INFO L87 Difference]: Start difference. First operand 3178 states and 4176 transitions. Second operand has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-25 23:45:46,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 23:45:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:49,151 INFO L93 Difference]: Finished difference Result 3580 states and 4679 transitions. [2022-11-25 23:45:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:45:49,152 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) Word has length 161 [2022-11-25 23:45:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:49,165 INFO L225 Difference]: With dead ends: 3580 [2022-11-25 23:45:49,165 INFO L226 Difference]: Without dead ends: 3576 [2022-11-25 23:45:49,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=414, Invalid=2888, Unknown=4, NotChecked=0, Total=3306 [2022-11-25 23:45:49,168 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:49,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 282 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 664 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-25 23:45:49,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2022-11-25 23:45:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3531. [2022-11-25 23:45:51,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 2190 states have (on average 1.1789954337899544) internal successors, (2582), 2228 states have internal predecessors, (2582), 1026 states have call successors, (1026), 315 states have call predecessors, (1026), 314 states have return successors, (1013), 987 states have call predecessors, (1013), 1013 states have call successors, (1013) [2022-11-25 23:45:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 4621 transitions. [2022-11-25 23:45:51,708 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 4621 transitions. Word has length 161 [2022-11-25 23:45:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:51,708 INFO L495 AbstractCegarLoop]: Abstraction has 3531 states and 4621 transitions. [2022-11-25 23:45:51,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-25 23:45:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 4621 transitions. [2022-11-25 23:45:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-25 23:45:51,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:51,713 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:45:51,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:51,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 23:45:51,925 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1081908013, now seen corresponding path program 6 times [2022-11-25 23:45:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:45:51,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581418433] [2022-11-25 23:45:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:51,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:45:51,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:45:51,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615345938] [2022-11-25 23:45:51,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:45:51,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:51,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:45:51,937 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:45:51,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bb590e7-8ca5-4a53-b6fb-d6f02e243511/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 23:45:52,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:45:52,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:45:52,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-25 23:45:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 251 proven. 189 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2022-11-25 23:45:55,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:11,625 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (or (<= (+ |c_ULTIMATE.start_main_~b~0#1| (* 2 .cse0) (* 2 .cse1)) (+ (* .cse2 2) (* 2 .cse3) (* .cse4 2) (* 2 .cse5))) (= (+ .cse6 .cse7 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|) .cse8 .cse9 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (+ .cse10 .cse11 .cse12 .cse13 .cse14 .cse15)) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse2 .cse4 .cse3 .cse5) (+ .cse0 .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (not (= (+ .cse2 .cse6 .cse4 .cse7 .cse8 .cse9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (+ .cse10 .cse11 .cse12 .cse13 .cse14 |c_ULTIMATE.start_main_~b~0#1| .cse15))) (not (= (+ .cse2 .cse4) |c_ULTIMATE.start_main_~b~0#1|)))) is different from true