./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i --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_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/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_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/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_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/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 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 --- 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 08:21:07,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:21:07,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:21:07,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:21:07,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:21:07,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:21:07,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:21:07,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:21:07,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:21:07,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:21:07,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:21:07,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:21:07,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:21:07,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:21:07,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:21:07,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:21:07,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:21:07,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:21:07,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:21:07,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:21:07,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:21:07,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:21:07,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:21:07,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:21:07,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:21:07,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:21:07,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:21:07,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:21:07,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:21:07,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:21:07,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:21:07,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:21:07,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:21:07,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:21:07,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:21:07,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:21:07,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:21:07,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:21:07,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:21:07,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:21:07,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:21:07,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:21:07,917 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:21:07,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:21:07,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:21:07,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:21:07,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:21:07,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:21:07,918 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:21:07,918 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:21:07,919 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:21:07,919 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:21:07,919 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:21:07,919 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:21:07,919 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:21:07,919 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:21:07,919 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:21:07,920 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:21:07,920 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:21:07,920 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:21:07,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:21:07,921 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:21:07,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:21:07,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:21:07,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:21:07,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:21:07,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:21:07,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:21:07,922 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:21:07,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:21:07,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:21:07,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:21:07,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:21:07,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:21:07,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:21:07,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:21:07,923 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:21:07,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:21:07,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:21:07,924 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:21:07,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:21:07,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:21:07,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:21:07,924 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_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 [2022-12-14 08:21:08,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:21:08,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:21:08,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:21:08,142 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:21:08,143 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:21:08,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2022-12-14 08:21:10,828 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:21:10,976 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:21:10,976 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2022-12-14 08:21:10,981 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/data/fbca7f39e/64e0881cda024589b5c17a17a3fdffa5/FLAGec1b0596f [2022-12-14 08:21:10,992 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/data/fbca7f39e/64e0881cda024589b5c17a17a3fdffa5 [2022-12-14 08:21:10,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:21:10,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:21:10,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:21:10,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:21:10,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:21:11,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:21:10" (1/1) ... [2022-12-14 08:21:11,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@286211a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11, skipping insertion in model container [2022-12-14 08:21:11,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:21:10" (1/1) ... [2022-12-14 08:21:11,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:21:11,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:21:11,151 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_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i[950,963] [2022-12-14 08:21:11,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:21:11,169 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:21:11,178 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_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i[950,963] [2022-12-14 08:21:11,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:21:11,198 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:21:11,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11 WrapperNode [2022-12-14 08:21:11,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:21:11,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:21:11,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:21:11,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:21:11,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,223 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-12-14 08:21:11,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:21:11,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:21:11,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:21:11,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:21:11,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,241 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:21:11,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:21:11,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:21:11,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:21:11,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (1/1) ... [2022-12-14 08:21:11,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:21:11,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:11,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:21:11,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:21:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:21:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 08:21:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 08:21:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:21:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:21:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:21:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 08:21:11,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 08:21:11,352 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:21:11,353 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:21:11,462 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:21:11,488 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:21:11,488 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 08:21:11,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:21:11 BoogieIcfgContainer [2022-12-14 08:21:11,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:21:11,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:21:11,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:21:11,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:21:11,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:21:10" (1/3) ... [2022-12-14 08:21:11,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d97895e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:21:11, skipping insertion in model container [2022-12-14 08:21:11,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:11" (2/3) ... [2022-12-14 08:21:11,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d97895e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:21:11, skipping insertion in model container [2022-12-14 08:21:11,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:21:11" (3/3) ... [2022-12-14 08:21:11,496 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.i [2022-12-14 08:21:11,511 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:21:11,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:21:11,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:21:11,554 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;@73608195, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:21:11,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:21:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 08:21:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:21:11,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:11,564 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:11,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:21:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:11,569 INFO L85 PathProgramCache]: Analyzing trace with hash 40099495, now seen corresponding path program 1 times [2022-12-14 08:21:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:11,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96133884] [2022-12-14 08:21:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:11,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:11,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96133884] [2022-12-14 08:21:11,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 08:21:11,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728380246] [2022-12-14 08:21:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:11,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:11,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:11,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:11,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:21:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:11,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 08:21:11,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:21:11,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:21:11,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728380246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:11,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:11,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:21:11,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128316805] [2022-12-14 08:21:11,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:11,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:21:11,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:11,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:21:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:21:11,821 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:21:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:11,852 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-12-14 08:21:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:21:11,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2022-12-14 08:21:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:11,862 INFO L225 Difference]: With dead ends: 35 [2022-12-14 08:21:11,862 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 08:21:11,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 08:21:11,871 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:11,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 08:21:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 08:21:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 08:21:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-12-14 08:21:11,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2022-12-14 08:21:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:11,909 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-12-14 08:21:11,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:21:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-12-14 08:21:11,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 08:21:11,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:11,911 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:11,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:21:12,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 08:21:12,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:21:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:12,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2056079682, now seen corresponding path program 1 times [2022-12-14 08:21:12,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:12,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687466812] [2022-12-14 08:21:12,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:12,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:12,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:21:12,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448378190] [2022-12-14 08:21:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:12,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:12,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:12,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:12,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:21:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 08:21:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:21:12,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:21:12,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:12,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687466812] [2022-12-14 08:21:12,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:21:12,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448378190] [2022-12-14 08:21:12,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448378190] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:12,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:21:12,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-12-14 08:21:12,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635679391] [2022-12-14 08:21:12,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:12,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:21:12,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:21:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:21:12,620 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:21:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:13,678 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-12-14 08:21:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:21:13,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2022-12-14 08:21:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:13,680 INFO L225 Difference]: With dead ends: 33 [2022-12-14 08:21:13,680 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 08:21:13,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:21:13,682 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:13,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 08:21:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 08:21:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 08:21:13,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 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 08:21:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-12-14 08:21:13,692 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2022-12-14 08:21:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:13,692 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-12-14 08:21:13,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:21:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-12-14 08:21:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 08:21:13,694 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:13,694 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:13,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:21:13,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:13,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:21:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash 190159033, now seen corresponding path program 1 times [2022-12-14 08:21:13,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:13,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536576228] [2022-12-14 08:21:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:13,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:13,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:21:13,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674829638] [2022-12-14 08:21:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:13,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:13,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:13,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:13,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:21:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:13,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 08:21:13,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:21:14,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:21:14,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:14,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536576228] [2022-12-14 08:21:14,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:21:14,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674829638] [2022-12-14 08:21:14,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674829638] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:14,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:21:14,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-12-14 08:21:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346521360] [2022-12-14 08:21:14,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:14,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:21:14,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:21:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:21:14,321 INFO L87 Difference]: Start difference. First operand 30 states and 36 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:21:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:14,582 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-12-14 08:21:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:21:14,582 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2022-12-14 08:21:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:14,583 INFO L225 Difference]: With dead ends: 40 [2022-12-14 08:21:14,583 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 08:21:14,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:21:14,585 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:14,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:21:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 08:21:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-12-14 08:21:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 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 08:21:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-12-14 08:21:14,593 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2022-12-14 08:21:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:14,594 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-12-14 08:21:14,594 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:21:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-12-14 08:21:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 08:21:14,595 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:14,595 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:14,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:21:14,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:14,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:21:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2136592426, now seen corresponding path program 1 times [2022-12-14 08:21:14,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:14,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411122383] [2022-12-14 08:21:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:14,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:14,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:21:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134770407] [2022-12-14 08:21:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:14,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:14,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:14,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:21:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:21:14,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:21:14,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:21:14,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411122383] [2022-12-14 08:21:14,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:21:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134770407] [2022-12-14 08:21:14,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134770407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:14,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:14,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:21:14,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758640304] [2022-12-14 08:21:14,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:14,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:21:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:21:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:21:14,901 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:21:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:14,928 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-12-14 08:21:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2022-12-14 08:21:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:14,930 INFO L225 Difference]: With dead ends: 43 [2022-12-14 08:21:14,930 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 08:21:14,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:21:14,932 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:14,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 08:21:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 08:21:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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 08:21:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-12-14 08:21:14,941 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 29 [2022-12-14 08:21:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:14,941 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-12-14 08:21:14,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 08:21:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-12-14 08:21:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 08:21:14,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:14,943 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:14,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:21:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:15,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:21:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:15,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1183920689, now seen corresponding path program 1 times [2022-12-14 08:21:15,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:15,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044935260] [2022-12-14 08:21:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:15,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:15,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:21:15,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819153410] [2022-12-14 08:21:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:15,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:15,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:15,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:15,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:21:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:15,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 08:21:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:21:16,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:33,409 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:21:51,252 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse5 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (<= (* 2 .cse4) .cse5) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse5)))) is different from true [2022-12-14 08:22:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-12-14 08:22:05,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:22:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044935260] [2022-12-14 08:22:05,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:22:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819153410] [2022-12-14 08:22:05,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819153410] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:22:05,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2125872919] [2022-12-14 08:22:05,650 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 08:22:05,650 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:22:05,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:22:05,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:22:05,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:22:06,445 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 08:22:06,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-12-14 08:22:06,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:22:20,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1049#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:22:20,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:22:20,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:22:20,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-12-14 08:22:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589898181] [2022-12-14 08:22:20,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:22:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 08:22:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:22:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 08:22:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=916, Unknown=2, NotChecked=62, Total=1122 [2022-12-14 08:22:20,943 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:22:25,976 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 08:22:29,099 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 08:22:33,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:22:33,298 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-12-14 08:22:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:22:33,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-12-14 08:22:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:22:33,299 INFO L225 Difference]: With dead ends: 40 [2022-12-14 08:22:33,299 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 08:22:33,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=207, Invalid=1355, Unknown=2, NotChecked=76, Total=1640 [2022-12-14 08:22:33,300 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:22:33,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 96 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 2 Unknown, 33 Unchecked, 10.3s Time] [2022-12-14 08:22:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 08:22:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-12-14 08:22:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 08:22:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-12-14 08:22:33,306 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2022-12-14 08:22:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:22:33,306 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-12-14 08:22:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 08:22:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-12-14 08:22:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 08:22:33,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:22:33,308 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:22:33,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:22:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:22:33,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:22:33,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:22:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash 953799673, now seen corresponding path program 2 times [2022-12-14 08:22:33,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:22:33,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537711644] [2022-12-14 08:22:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:22:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:22:33,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:22:33,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131573957] [2022-12-14 08:22:33,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:22:33,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:22:33,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:22:33,549 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:22:33,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:22:35,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:22:35,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:22:35,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:22:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:22:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:22:35,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:22:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:22:36,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:22:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537711644] [2022-12-14 08:22:36,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:22:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131573957] [2022-12-14 08:22:36,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131573957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:22:36,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816662207] [2022-12-14 08:22:36,661 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 08:22:36,661 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:22:36,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:22:36,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:22:36,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:22:37,523 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-12-14 08:22:37,564 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-12-14 08:22:37,573 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:22:39,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1420#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:22:39,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:22:39,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:22:39,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2022-12-14 08:22:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614994072] [2022-12-14 08:22:39,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:22:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:22:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:22:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:22:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-12-14 08:22:39,116 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 08:22:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:22:41,995 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-12-14 08:22:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:22:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 38 [2022-12-14 08:22:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:22:41,998 INFO L225 Difference]: With dead ends: 52 [2022-12-14 08:22:41,998 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 08:22:41,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-12-14 08:22:41,999 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:22:41,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 67 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 08:22:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 08:22:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 08:22:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 08:22:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-14 08:22:42,005 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 38 [2022-12-14 08:22:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:22:42,005 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-14 08:22:42,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 08:22:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-14 08:22:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 08:22:42,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:22:42,006 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:22:42,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:22:42,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:22:42,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:22:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:22:42,209 INFO L85 PathProgramCache]: Analyzing trace with hash 493314036, now seen corresponding path program 3 times [2022-12-14 08:22:42,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:22:42,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912127677] [2022-12-14 08:22:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:22:42,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:22:42,244 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:22:42,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87370643] [2022-12-14 08:22:42,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:22:42,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:22:42,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:22:42,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:22:42,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:23:18,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:23:18,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:23:18,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 08:23:18,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:23:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 08:23:22,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:23:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 08:23:55,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:23:55,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912127677] [2022-12-14 08:23:55,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:23:55,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87370643] [2022-12-14 08:23:55,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87370643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:23:55,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234989894] [2022-12-14 08:23:55,476 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 08:23:55,476 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:23:55,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:23:55,477 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:23:55,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:23:56,099 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-12-14 08:23:56,125 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-12-14 08:23:56,131 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:24:02,726 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1830#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:24:02,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:24:02,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:24:02,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-12-14 08:24:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856561796] [2022-12-14 08:24:02,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:24:02,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 08:24:02,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:24:02,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 08:24:02,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1094, Unknown=9, NotChecked=0, Total=1260 [2022-12-14 08:24:02,728 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 08:26:06,905 WARN L233 SmtUtils]: Spent 1.69m on a formula simplification that was a NOOP. DAG size: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:26:10,825 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 08:26:12,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:26:14,528 WARN L539 Checker$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 08:26:16,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:26:18,556 WARN L539 Checker$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 08:26:28,249 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:26:30,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:27:26,134 WARN L233 SmtUtils]: Spent 47.29s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:27:28,142 WARN L539 Checker$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 08:27:30,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:27:32,327 WARN L539 Checker$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 08:27:35,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:27:39,156 WARN L539 Checker$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 08:28:03,551 WARN L233 SmtUtils]: Spent 9.38s on a formula simplification. DAG size of input: 78 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:28:04,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:28:38,724 WARN L233 SmtUtils]: Spent 25.30s on a formula simplification. DAG size of input: 111 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:28:51,276 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:28:53,588 WARN L539 Checker$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 08:28:56,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:28:58,078 WARN L539 Checker$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 08:29:19,815 WARN L233 SmtUtils]: Spent 13.55s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:29:21,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:29:24,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:29:27,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:30:08,766 WARN L233 SmtUtils]: Spent 24.65s on a formula simplification. DAG size of input: 77 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:30:10,774 WARN L539 Checker$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 08:30:56,669 WARN L233 SmtUtils]: Spent 34.46s on a formula simplification. DAG size of input: 104 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:30:59,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:02,036 WARN L539 Checker$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 08:31:06,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:08,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:10,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:12,457 WARN L539 Checker$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 08:31:18,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:21,310 WARN L539 Checker$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 08:31:28,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:29,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:31,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:33,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:35,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:37,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:39,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:42,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:44,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:46,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:48,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:50,230 WARN L539 Checker$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 08:31:52,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:54,580 WARN L539 Checker$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 08:31:56,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 08:31:56,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:31:56,579 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2022-12-14 08:31:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 08:31:56,584 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 40 [2022-12-14 08:31:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:31:56,585 INFO L225 Difference]: With dead ends: 90 [2022-12-14 08:31:56,585 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 08:31:56,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 411.2s TimeCoverageRelationStatistics Valid=325, Invalid=1998, Unknown=29, NotChecked=0, Total=2352 [2022-12-14 08:31:56,587 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 73 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 47 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:31:56,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 165 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 369 Invalid, 27 Unknown, 0 Unchecked, 97.8s Time] [2022-12-14 08:31:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 08:31:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2022-12-14 08:31:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 08:31:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-12-14 08:31:56,633 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 40 [2022-12-14 08:31:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:31:56,634 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-12-14 08:31:56,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 08:31:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-12-14 08:31:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 08:31:56,635 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:31:56,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:31:56,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 08:31:56,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:31:56,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:31:56,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:31:56,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1417331559, now seen corresponding path program 4 times [2022-12-14 08:31:56,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:31:56,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385192868] [2022-12-14 08:31:56,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:31:56,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:31:56,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:31:56,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852957587] [2022-12-14 08:31:56,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:31:56,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:31:56,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:31:56,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:31:56,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4fc458a-f1d0-4808-8bc2-13f4391bdfc7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:32:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:32:25,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 08:32:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:32:56,978 WARN L233 SmtUtils]: Spent 7.98s on a formula simplification that was a NOOP. DAG size: 121 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:33:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 08:33:45,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:34:56,456 WARN L233 SmtUtils]: Spent 23.56s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:35:57,854 WARN L233 SmtUtils]: Spent 17.30s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)