./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aa72233183b4e91144bd6a6eb8a8b140b7f90e590c3e855f829f337fec510ab9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:34:15,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:34:15,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:34:15,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:34:15,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:34:15,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:34:15,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:34:15,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:34:15,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:34:15,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:34:15,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:34:15,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:34:15,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:34:15,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:34:15,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:34:15,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:34:15,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:34:15,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:34:15,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:34:15,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:34:15,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:34:15,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:34:15,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:34:15,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:34:15,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:34:15,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:34:15,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:34:15,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:34:15,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:34:15,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:34:15,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:34:15,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:34:15,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:34:15,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:34:15,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:34:15,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:34:15,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:34:15,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:34:15,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:34:15,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:34:15,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:34:15,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:34:15,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:34:15,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:34:15,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:34:15,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:34:15,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:34:15,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:34:15,835 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:34:15,835 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:34:15,835 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:34:15,836 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:34:15,836 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:34:15,836 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:34:15,836 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:34:15,836 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:34:15,836 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:34:15,837 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:34:15,837 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:34:15,837 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:34:15,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:34:15,838 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:34:15,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:34:15,838 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:34:15,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:34:15,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:34:15,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:34:15,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:34:15,839 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:34:15,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:34:15,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:34:15,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:34:15,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:34:15,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:34:15,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:34:15,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:34:15,840 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:34:15,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:34:15,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:34:15,841 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:34:15,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:34:15,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:34:15,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:34:15,841 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_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa72233183b4e91144bd6a6eb8a8b140b7f90e590c3e855f829f337fec510ab9 [2022-12-14 12:34:16,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:34:16,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:34:16,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:34:16,032 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:34:16,032 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:34:16,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound100.c [2022-12-14 12:34:18,652 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:34:18,798 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:34:18,798 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound100.c [2022-12-14 12:34:18,803 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/data/8c4d9b4c1/45fe4844e44844a8862cbac9ea9ee903/FLAGe9e54c3d7 [2022-12-14 12:34:18,812 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/data/8c4d9b4c1/45fe4844e44844a8862cbac9ea9ee903 [2022-12-14 12:34:18,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:34:18,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:34:18,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:34:18,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:34:18,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:34:18,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:18,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2041bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18, skipping insertion in model container [2022-12-14 12:34:18,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:18,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:34:18,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:34:18,947 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_e6eafd20-4c95-4656-b92d-ccb665ffadf7/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound100.c[537,550] [2022-12-14 12:34:18,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:34:18,966 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:34:18,974 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_e6eafd20-4c95-4656-b92d-ccb665ffadf7/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound100.c[537,550] [2022-12-14 12:34:18,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:34:18,988 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:34:18,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18 WrapperNode [2022-12-14 12:34:18,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:34:18,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:34:18,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:34:18,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:34:18,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,012 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-12-14 12:34:19,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:34:19,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:34:19,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:34:19,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:34:19,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,029 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:34:19,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:34:19,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:34:19,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:34:19,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (1/1) ... [2022-12-14 12:34:19,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:34:19,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:19,061 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:34:19,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:34:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:34:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:34:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:34:19,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:34:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:34:19,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:34:19,154 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:34:19,156 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:34:19,279 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:34:19,314 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:34:19,314 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:34:19,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:34:19 BoogieIcfgContainer [2022-12-14 12:34:19,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:34:19,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:34:19,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:34:19,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:34:19,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:34:18" (1/3) ... [2022-12-14 12:34:19,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfadd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:34:19, skipping insertion in model container [2022-12-14 12:34:19,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:34:18" (2/3) ... [2022-12-14 12:34:19,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfadd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:34:19, skipping insertion in model container [2022-12-14 12:34:19,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:34:19" (3/3) ... [2022-12-14 12:34:19,321 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound100.c [2022-12-14 12:34:19,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:34:19,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:34:19,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:34:19,375 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;@63c6d8c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:34:19,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:34:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 12:34:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:34:19,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:19,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:19,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash 151460259, now seen corresponding path program 1 times [2022-12-14 12:34:19,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:19,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800988003] [2022-12-14 12:34:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:19,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:19,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800988003] [2022-12-14 12:34:19,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 12:34:19,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631904940] [2022-12-14 12:34:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:19,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:19,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:19,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:34:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 12:34:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:19,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:34:19,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631904940] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:19,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:34:19,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:34:19,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240603029] [2022-12-14 12:34:19,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:19,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 12:34:19,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 12:34:19,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:34:19,578 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:19,605 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2022-12-14 12:34:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 12:34:19,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 12:34:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:19,612 INFO L225 Difference]: With dead ends: 43 [2022-12-14 12:34:19,612 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 12:34:19,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:34:19,617 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-12-14 12:34:19,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:34:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 12:34:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 12:34:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 12:34:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-12-14 12:34:19,642 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2022-12-14 12:34:19,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:19,643 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-12-14 12:34:19,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-12-14 12:34:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:34:19,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:19,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:19,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:34:19,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 12:34:19,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash -310598151, now seen corresponding path program 1 times [2022-12-14 12:34:19,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:19,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230486192] [2022-12-14 12:34:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:19,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:20,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:20,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230486192] [2022-12-14 12:34:20,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230486192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:20,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:34:20,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:34:20,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330210923] [2022-12-14 12:34:20,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:20,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:34:20,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:34:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:34:20,127 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:20,181 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2022-12-14 12:34:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:34:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 12:34:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:20,183 INFO L225 Difference]: With dead ends: 33 [2022-12-14 12:34:20,183 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 12:34:20,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:34:20,184 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:20,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 84 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:34:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 12:34:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-12-14 12:34:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 12:34:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-12-14 12:34:20,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2022-12-14 12:34:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:20,195 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-12-14 12:34:20,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-12-14 12:34:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:34:20,196 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:20,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:20,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:34:20,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash -751211152, now seen corresponding path program 1 times [2022-12-14 12:34:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:20,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514589536] [2022-12-14 12:34:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:20,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:20,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:20,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514589536] [2022-12-14 12:34:20,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 12:34:20,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239803425] [2022-12-14 12:34:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:20,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:20,213 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:20,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:34:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:20,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:34:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:20,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:34:20,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239803425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:20,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:34:20,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:34:20,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335547889] [2022-12-14 12:34:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:20,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:34:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:34:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:34:20,274 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:20,292 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-12-14 12:34:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:34:20,293 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:34:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:20,293 INFO L225 Difference]: With dead ends: 39 [2022-12-14 12:34:20,293 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 12:34:20,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:34:20,294 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:20,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:34:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 12:34:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 12:34:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 12:34:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-12-14 12:34:20,299 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2022-12-14 12:34:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:20,299 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-12-14 12:34:20,299 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:34:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-12-14 12:34:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:34:20,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:20,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:20,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 12:34:20,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:20,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:20,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1841718534, now seen corresponding path program 1 times [2022-12-14 12:34:20,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062552292] [2022-12-14 12:34:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:34:20,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062552292] [2022-12-14 12:34:20,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062552292] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:20,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:34:20,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:34:20,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728768158] [2022-12-14 12:34:20,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:34:20,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:34:20,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:34:20,726 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 12:34:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:20,773 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-12-14 12:34:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:34:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-12-14 12:34:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:20,774 INFO L225 Difference]: With dead ends: 39 [2022-12-14 12:34:20,774 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 12:34:20,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:34:20,775 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:20,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 84 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:34:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 12:34:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-12-14 12:34:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 12:34:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-12-14 12:34:20,780 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-12-14 12:34:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:20,781 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-12-14 12:34:20,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 12:34:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-12-14 12:34:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:34:20,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:20,782 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:20,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:34:20,782 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1224204839, now seen corresponding path program 1 times [2022-12-14 12:34:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:20,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586686744] [2022-12-14 12:34:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:20,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:20,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:20,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624817901] [2022-12-14 12:34:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:20,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:20,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:20,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:34:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:20,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 12:34:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:34:20,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:34:21,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:21,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586686744] [2022-12-14 12:34:21,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:21,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624817901] [2022-12-14 12:34:21,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624817901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:21,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002157668] [2022-12-14 12:34:21,158 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:34:21,158 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:21,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:21,165 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:21,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:21,324 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-12-14 12:34:21,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:21,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2002157668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:21,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:21,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-12-14 12:34:21,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003428932] [2022-12-14 12:34:21,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:21,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:34:21,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:34:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:34:21,722 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 12:34:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:21,849 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-12-14 12:34:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:34:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-12-14 12:34:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:21,851 INFO L225 Difference]: With dead ends: 49 [2022-12-14 12:34:21,851 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 12:34:21,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:34:21,852 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:21,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:34:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 12:34:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-12-14 12:34:21,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 12:34:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-12-14 12:34:21,859 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2022-12-14 12:34:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:21,859 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-12-14 12:34:21,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 12:34:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-12-14 12:34:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:34:21,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:21,860 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:21,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:34:22,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:22,060 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1437524276, now seen corresponding path program 1 times [2022-12-14 12:34:22,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:22,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784831202] [2022-12-14 12:34:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:22,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:22,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:22,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188499898] [2022-12-14 12:34:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:22,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:22,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:22,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:22,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:34:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:34:22,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:34:22,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:34:22,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784831202] [2022-12-14 12:34:22,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:22,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188499898] [2022-12-14 12:34:22,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188499898] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:22,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:34:22,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:34:22,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732477886] [2022-12-14 12:34:22,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:22,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:34:22,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:22,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:34:22,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:34:22,140 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:34:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:22,175 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-12-14 12:34:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:34:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-12-14 12:34:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:22,177 INFO L225 Difference]: With dead ends: 57 [2022-12-14 12:34:22,177 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 12:34:22,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:34:22,178 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:22,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:34:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 12:34:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-12-14 12:34:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 12:34:22,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-12-14 12:34:22,188 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 25 [2022-12-14 12:34:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:22,188 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-12-14 12:34:22,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:34:22,189 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-12-14 12:34:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:34:22,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:22,189 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:22,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 12:34:22,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:22,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:22,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1439252154, now seen corresponding path program 1 times [2022-12-14 12:34:22,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:22,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618882673] [2022-12-14 12:34:22,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:22,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:22,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:22,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603175480] [2022-12-14 12:34:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:22,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:22,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:22,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:22,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:34:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:22,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 12:34:22,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:34:22,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:34:22,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:22,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618882673] [2022-12-14 12:34:22,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:22,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603175480] [2022-12-14 12:34:22,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603175480] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:22,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:34:22,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:34:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756580083] [2022-12-14 12:34:22,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:22,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:34:22,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:34:22,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:34:22,593 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:34:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:22,701 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-12-14 12:34:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:34:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-12-14 12:34:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:22,703 INFO L225 Difference]: With dead ends: 59 [2022-12-14 12:34:22,703 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 12:34:22,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:34:22,704 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:22,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 97 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:34:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 12:34:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-14 12:34:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 12:34:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-14 12:34:22,716 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 25 [2022-12-14 12:34:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:22,716 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-14 12:34:22,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 12:34:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-14 12:34:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 12:34:22,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:22,717 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:22,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:34:22,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 12:34:22,918 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:22,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:22,918 INFO L85 PathProgramCache]: Analyzing trace with hash 964329913, now seen corresponding path program 1 times [2022-12-14 12:34:22,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:22,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639818574] [2022-12-14 12:34:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:22,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:22,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:22,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127584665] [2022-12-14 12:34:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:22,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:22,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:22,927 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:22,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:34:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:22,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:34:22,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:34:22,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:34:23,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:23,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639818574] [2022-12-14 12:34:23,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127584665] [2022-12-14 12:34:23,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127584665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:23,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422178409] [2022-12-14 12:34:23,021 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 12:34:23,021 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:23,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:23,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:23,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:24,867 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 12:34:24,870 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:38,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1341#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:38,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:38,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:38,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-12-14 12:34:38,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789819093] [2022-12-14 12:34:38,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:38,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:34:38,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:38,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:34:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=342, Unknown=5, NotChecked=0, Total=420 [2022-12-14 12:34:38,266 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:34:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:38,380 INFO L93 Difference]: Finished difference Result 118 states and 141 transitions. [2022-12-14 12:34:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:34:38,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 27 [2022-12-14 12:34:38,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:38,382 INFO L225 Difference]: With dead ends: 118 [2022-12-14 12:34:38,382 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 12:34:38,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=93, Invalid=454, Unknown=5, NotChecked=0, Total=552 [2022-12-14 12:34:38,383 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:38,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 131 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:34:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 12:34:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-12-14 12:34:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 64 states have (on average 1.1875) internal successors, (76), 66 states have internal predecessors, (76), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 12:34:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2022-12-14 12:34:38,399 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 27 [2022-12-14 12:34:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:38,399 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2022-12-14 12:34:38,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:34:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2022-12-14 12:34:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:34:38,400 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:38,400 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:38,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:34:38,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:38,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash -12098523, now seen corresponding path program 1 times [2022-12-14 12:34:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:38,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68374585] [2022-12-14 12:34:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:38,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:38,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:38,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890330903] [2022-12-14 12:34:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:38,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:38,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:38,618 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:38,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:34:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:38,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 12:34:38,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:34:38,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 12:34:38,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:38,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68374585] [2022-12-14 12:34:38,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:38,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890330903] [2022-12-14 12:34:38,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890330903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:38,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1251001813] [2022-12-14 12:34:38,828 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 12:34:38,828 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:38,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:38,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:38,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:39,043 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 56 for LOIs [2022-12-14 12:34:39,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:40,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1251001813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:34:40,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:40,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 6] total 17 [2022-12-14 12:34:40,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667705560] [2022-12-14 12:34:40,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:34:40,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:34:40,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:34:40,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:34:40,752 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 12:34:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:42,169 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2022-12-14 12:34:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:34:42,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-12-14 12:34:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:42,171 INFO L225 Difference]: With dead ends: 128 [2022-12-14 12:34:42,171 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 12:34:42,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:34:42,172 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:42,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 77 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 12:34:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 12:34:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-12-14 12:34:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 60 states have internal predecessors, (69), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 12:34:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-12-14 12:34:42,185 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 30 [2022-12-14 12:34:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:42,185 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-12-14 12:34:42,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 12:34:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-12-14 12:34:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 12:34:42,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:42,186 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 12:34:42,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 12:34:42,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:42,388 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:42,389 INFO L85 PathProgramCache]: Analyzing trace with hash -327624414, now seen corresponding path program 1 times [2022-12-14 12:34:42,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:42,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71622238] [2022-12-14 12:34:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:42,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:42,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:42,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080101715] [2022-12-14 12:34:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:42,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:42,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:42,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:34:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 12:34:42,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:34:42,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:34:43,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:43,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71622238] [2022-12-14 12:34:43,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:43,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080101715] [2022-12-14 12:34:43,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080101715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:43,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831942380] [2022-12-14 12:34:43,069 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 12:34:43,069 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:43,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:43,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:43,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:44,645 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 12:34:44,648 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:45,352 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2394#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:45,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:45,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:34:45,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-12-14 12:34:45,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871909844] [2022-12-14 12:34:45,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:45,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:34:45,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:34:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:34:45,353 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 12:34:50,420 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 [] [2022-12-14 12:34:52,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:34:53,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:34:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:34:53,955 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2022-12-14 12:34:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:34:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 35 [2022-12-14 12:34:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:34:53,957 INFO L225 Difference]: With dead ends: 119 [2022-12-14 12:34:53,957 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 12:34:53,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:34:53,958 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:34:53,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 113 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 275 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2022-12-14 12:34:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 12:34:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2022-12-14 12:34:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 69 states have internal predecessors, (76), 22 states have call successors, (22), 14 states have call predecessors, (22), 14 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 12:34:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-12-14 12:34:53,967 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 35 [2022-12-14 12:34:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:34:53,967 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-12-14 12:34:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 12:34:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-12-14 12:34:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 12:34:53,968 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:34:53,968 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:34:53,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 12:34:54,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:54,170 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:34:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:34:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1605911421, now seen corresponding path program 1 times [2022-12-14 12:34:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:34:54,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731529711] [2022-12-14 12:34:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:34:54,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:34:54,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412899894] [2022-12-14 12:34:54,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:34:54,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:34:54,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:34:54,193 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:34:54,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:34:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:34:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:34:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:34:54,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 12:34:54,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:34:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731529711] [2022-12-14 12:34:54,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:34:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412899894] [2022-12-14 12:34:54,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412899894] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604746302] [2022-12-14 12:34:54,314 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 12:34:54,314 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:54,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:54,315 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:54,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:55,830 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2022-12-14 12:34:55,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:35:11,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2989#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:35:11,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:35:11,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:35:11,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-12-14 12:35:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294178990] [2022-12-14 12:35:11,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:35:11,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:35:11,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:35:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:35:11,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=417, Unknown=4, NotChecked=0, Total=506 [2022-12-14 12:35:11,768 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 12:35:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:35:11,942 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2022-12-14 12:35:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:35:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2022-12-14 12:35:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:35:11,943 INFO L225 Difference]: With dead ends: 190 [2022-12-14 12:35:11,944 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 12:35:11,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=104, Invalid=542, Unknown=4, NotChecked=0, Total=650 [2022-12-14 12:35:11,945 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:35:11,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 234 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:35:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 12:35:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2022-12-14 12:35:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 108 states have (on average 1.1481481481481481) internal successors, (124), 114 states have internal predecessors, (124), 38 states have call successors, (38), 22 states have call predecessors, (38), 22 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-14 12:35:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 197 transitions. [2022-12-14 12:35:11,963 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 197 transitions. Word has length 43 [2022-12-14 12:35:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:35:11,964 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 197 transitions. [2022-12-14 12:35:11,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 12:35:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 197 transitions. [2022-12-14 12:35:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 12:35:11,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:35:11,965 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:35:11,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 12:35:12,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:35:12,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:35:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:35:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1607639299, now seen corresponding path program 1 times [2022-12-14 12:35:12,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:35:12,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569581036] [2022-12-14 12:35:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:12,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:35:12,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:35:12,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334298207] [2022-12-14 12:35:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:35:12,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:35:12,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:35:12,177 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:35:12,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:35:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:35:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:35:12,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:35:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:35:16,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:35:17,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:35:17,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569581036] [2022-12-14 12:35:17,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:35:17,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334298207] [2022-12-14 12:35:17,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334298207] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:35:17,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1302957822] [2022-12-14 12:35:17,683 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 12:35:17,683 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:35:17,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:35:17,684 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:35:17,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:35:19,164 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2022-12-14 12:35:19,200 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:35:48,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3688#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 12:35:48,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:35:48,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:35:48,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-12-14 12:35:48,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432364305] [2022-12-14 12:35:48,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 12:35:48,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:35:48,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:35:48,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:35:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=596, Unknown=10, NotChecked=0, Total=702 [2022-12-14 12:35:48,207 INFO L87 Difference]: Start difference. First operand 169 states and 197 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:35:50,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:36:00,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:36:03,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:36:04,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:36:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:36:06,273 INFO L93 Difference]: Finished difference Result 203 states and 242 transitions. [2022-12-14 12:36:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:36:06,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-12-14 12:36:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:36:06,275 INFO L225 Difference]: With dead ends: 203 [2022-12-14 12:36:06,275 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 12:36:06,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=118, Invalid=742, Unknown=10, NotChecked=0, Total=870 [2022-12-14 12:36:06,276 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:36:06,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 100 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 203 Invalid, 3 Unknown, 0 Unchecked, 10.5s Time] [2022-12-14 12:36:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 12:36:06,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 187. [2022-12-14 12:36:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 120 states have (on average 1.15) internal successors, (138), 126 states have internal predecessors, (138), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 12:36:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 217 transitions. [2022-12-14 12:36:06,295 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 217 transitions. Word has length 43 [2022-12-14 12:36:06,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:36:06,296 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 217 transitions. [2022-12-14 12:36:06,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:36:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 217 transitions. [2022-12-14 12:36:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 12:36:06,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:36:06,297 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:36:06,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:36:06,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:36:06,499 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:36:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:36:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2003316837, now seen corresponding path program 1 times [2022-12-14 12:36:06,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:36:06,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140629620] [2022-12-14 12:36:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:06,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:36:06,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:36:06,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277804981] [2022-12-14 12:36:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:06,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:36:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:36:06,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:36:06,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6eafd20-4c95-4656-b92d-ccb665ffadf7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:36:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:36:06,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 12:36:06,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:36:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 12:36:07,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:36:31,062 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~d~0#1| 4294967296))) (or (= .cse0 1) (not (= .cse1 (mod (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) 4294967296))) (let ((.cse5 (div .cse1 2))) (let ((.cse2 (<= (mod .cse5 4294967296) (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (.cse6 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (and (or (not .cse2) (let ((.cse3 (* |c_ULTIMATE.start_main_~B~0#1| (div .cse0 2)))) (let ((.cse7 (* (div (+ .cse3 (- .cse5) .cse4 |c_ULTIMATE.start_main_~r~0#1|) 4294967296) 4294967296))) (and (< (+ .cse3 .cse4 |c_ULTIMATE.start_main_~r~0#1|) (+ .cse5 .cse6 1 .cse7)) (< (+ .cse5 .cse6 .cse7) (+ .cse3 .cse4 |c_ULTIMATE.start_main_~r~0#1| 1)))))) (or .cse2 (let ((.cse9 (+ .cse4 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse8 (* (div .cse9 4294967296) 4294967296))) (and (< (+ .cse6 .cse8) (+ .cse4 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse9 (+ .cse6 1 .cse8))))))))))) is different from true [2022-12-14 12:38:54,389 WARN L233 SmtUtils]: Spent 43.21s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:41:54,139 WARN L233 SmtUtils]: Spent 7.17s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:42:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 76 trivial. 3 not checked. [2022-12-14 12:42:15,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:42:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140629620] [2022-12-14 12:42:15,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:42:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277804981] [2022-12-14 12:42:15,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277804981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:42:15,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338193778] [2022-12-14 12:42:15,840 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 12:42:15,840 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:42:15,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:42:15,840 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:42:15,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:42:18,120 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2022-12-14 12:42:18,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:43:03,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4618#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:43:03,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:43:03,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:43:03,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-12-14 12:43:03,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705745804] [2022-12-14 12:43:03,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:43:03,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:43:03,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:43:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:43:03,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=836, Unknown=31, NotChecked=60, Total=1056 [2022-12-14 12:43:03,323 INFO L87 Difference]: Start difference. First operand 187 states and 217 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 9 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 12:43:05,333 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 [] [2022-12-14 12:43:08,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:10,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:14,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:16,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:18,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:20,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:23,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:25,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:34,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:36,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:38,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:40,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:42,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:44,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:46,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:43:48,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:44:06,633 WARN L233 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 84 DAG size of output: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:44:09,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:44:10,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:44:12,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:44:14,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:44:20,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:44:22,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:44:24,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:45:39,881 WARN L233 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 54 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:45:41,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:45:43,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:45:45,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:45:47,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:45:51,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:45:56,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:45:58,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:45:59,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:46:01,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:46:04,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:46:06,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:46:08,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:46:10,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:47:13,764 WARN L233 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 81 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:47:15,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:47:17,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:47:19,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:47:21,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:47:24,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:47:26,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 12:47:28,380 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 []