./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS --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 a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 --- 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-8393723 [2022-11-19 08:04:05,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:04:05,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:04:05,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:04:05,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:04:05,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:04:05,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:04:05,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:04:05,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:04:05,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:04:05,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:04:05,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:04:05,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:04:05,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:04:05,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:04:05,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:04:05,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:04:05,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:04:05,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:04:05,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:04:05,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:04:05,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:04:05,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:04:05,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:04:05,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:04:05,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:04:05,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:04:05,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:04:05,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:04:05,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:04:05,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:04:05,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:04:05,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:04:05,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:04:05,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:04:05,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:04:05,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:04:05,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:04:05,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:04:05,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:04:05,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:04:05,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:04:05,625 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:04:05,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:04:05,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:04:05,630 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:04:05,631 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:04:05,631 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:04:05,631 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:04:05,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:04:05,632 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:04:05,632 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:04:05,633 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:04:05,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:04:05,633 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:04:05,634 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:04:05,634 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:04:05,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:04:05,634 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:04:05,634 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:04:05,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:04:05,635 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:04:05,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:04:05,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:04:05,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:04:05,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:04:05,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:04:05,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:04:05,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:04:05,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:04:05,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:04:05,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:04:05,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:04:05,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:04:05,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:05,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:04:05,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:04:05,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:04:05,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:04:05,639 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:04:05,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:04:05,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:04:05,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:04:05,640 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_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2e0d3ed79ba62190a0b501c090bc81fd178363cb7e6ce8cbe0996ce655e2ac6 [2022-11-19 08:04:05,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:04:05,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:04:05,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:04:05,900 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:04:05,901 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:04:05,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-11-19 08:04:05,956 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/data/31b5d2371/7b7ab64cbd044bb68a8bdc0e1ae15f58/FLAG68f142890 [2022-11-19 08:04:06,387 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:04:06,387 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c [2022-11-19 08:04:06,394 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/data/31b5d2371/7b7ab64cbd044bb68a8bdc0e1ae15f58/FLAG68f142890 [2022-11-19 08:04:06,790 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/data/31b5d2371/7b7ab64cbd044bb68a8bdc0e1ae15f58 [2022-11-19 08:04:06,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:04:06,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:04:06,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:06,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:04:06,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:04:06,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:06" (1/1) ... [2022-11-19 08:04:06,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4629eea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:06, skipping insertion in model container [2022-11-19 08:04:06,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:06" (1/1) ... [2022-11-19 08:04:06,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:04:06,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:04:07,016 WARN L234 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_41a043dd-575e-480a-a957-34a3c055ffec/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2022-11-19 08:04:07,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:07,060 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:04:07,074 WARN L234 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_41a043dd-575e-480a-a957-34a3c055ffec/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound1.c[525,538] [2022-11-19 08:04:07,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:04:07,125 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:04:07,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07 WrapperNode [2022-11-19 08:04:07,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:04:07,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:07,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:04:07,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:04:07,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,187 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-11-19 08:04:07,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:04:07,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:04:07,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:04:07,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:04:07,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:04:07,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:04:07,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:04:07,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:04:07,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (1/1) ... [2022-11-19 08:04:07,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:04:07,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:07,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:04:07,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:04:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:04:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:04:07,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:04:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:04:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:04:07,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:04:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 08:04:07,316 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 08:04:07,378 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:04:07,379 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:04:07,592 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:04:07,654 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:04:07,662 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:04:07,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:07 BoogieIcfgContainer [2022-11-19 08:04:07,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:04:07,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:04:07,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:04:07,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:04:07,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:06" (1/3) ... [2022-11-19 08:04:07,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6658573a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:07, skipping insertion in model container [2022-11-19 08:04:07,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:07" (2/3) ... [2022-11-19 08:04:07,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6658573a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:07, skipping insertion in model container [2022-11-19 08:04:07,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:07" (3/3) ... [2022-11-19 08:04:07,676 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2022-11-19 08:04:07,695 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:04:07,695 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:04:07,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:04:07,779 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;@7bc7035, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:04:07,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:04:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 08:04:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:04:07,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:07,792 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:07,793 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash 282219046, now seen corresponding path program 1 times [2022-11-19 08:04:07,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:07,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090796916] [2022-11-19 08:04:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:07,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:07,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:07,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090796916] [2022-11-19 08:04:07,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:04:07,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476057512] [2022-11-19 08:04:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:07,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:07,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:08,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:04:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:08,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 08:04:08,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:08,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:08,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476057512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:08,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:08,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:04:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798822019] [2022-11-19 08:04:08,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:08,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:04:08,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:04:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:04:08,179 INFO L87 Difference]: Start difference. First operand has 27 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:04:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:08,223 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2022-11-19 08:04:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:04:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-19 08:04:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:08,234 INFO L225 Difference]: With dead ends: 46 [2022-11-19 08:04:08,234 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 08:04:08,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:04:08,244 INFO L413 NwaCegarLoop]: 33 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, 33 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 [2022-11-19 08:04:08,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:04:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 08:04:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 08:04:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:04:08,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-11-19 08:04:08,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 14 [2022-11-19 08:04:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:08,299 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-11-19 08:04:08,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:04:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-19 08:04:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:04:08,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:08,301 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:08,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:04:08,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:08,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:08,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1143065712, now seen corresponding path program 1 times [2022-11-19 08:04:08,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:08,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742209699] [2022-11-19 08:04:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:08,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:09,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:09,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742209699] [2022-11-19 08:04:09,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742209699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:09,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:09,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:04:09,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029506421] [2022-11-19 08:04:09,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:09,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:09,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:09,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:09,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:09,094 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:04:11,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:04:12,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:04:15,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:04:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:16,250 INFO L93 Difference]: Finished difference Result 59 states and 87 transitions. [2022-11-19 08:04:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:04:16,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-11-19 08:04:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:16,252 INFO L225 Difference]: With dead ends: 59 [2022-11-19 08:04:16,252 INFO L226 Difference]: Without dead ends: 42 [2022-11-19 08:04:16,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:16,254 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:16,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 88 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-19 08:04:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-19 08:04:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-19 08:04:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 08:04:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2022-11-19 08:04:16,273 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 15 [2022-11-19 08:04:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:16,273 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2022-11-19 08:04:16,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:04:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2022-11-19 08:04:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:04:16,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:16,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:16,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:04:16,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash -720172405, now seen corresponding path program 1 times [2022-11-19 08:04:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:16,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411999607] [2022-11-19 08:04:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:16,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:16,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411999607] [2022-11-19 08:04:16,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411999607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:16,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024398238] [2022-11-19 08:04:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:16,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:16,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:16,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:04:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:16,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:04:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:16,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:17,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024398238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:17,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962936785] [2022-11-19 08:04:17,202 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:04:17,202 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:17,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:17,212 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:17,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:17,909 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 87 for LOIs [2022-11-19 08:04:18,022 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2022-11-19 08:04:18,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:19,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1962936785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:19,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:19,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 7, 7] total 24 [2022-11-19 08:04:19,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706931282] [2022-11-19 08:04:19,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:19,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:04:19,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:19,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:04:19,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:04:19,866 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:04:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:21,562 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2022-11-19 08:04:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:04:21,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-19 08:04:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:21,564 INFO L225 Difference]: With dead ends: 71 [2022-11-19 08:04:21,564 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 08:04:21,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:04:21,566 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:21,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 54 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 41 Invalid, 0 Unknown, 136 Unchecked, 1.6s Time] [2022-11-19 08:04:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 08:04:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2022-11-19 08:04:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-19 08:04:21,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2022-11-19 08:04:21,601 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 17 [2022-11-19 08:04:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:21,601 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2022-11-19 08:04:21,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:04:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2022-11-19 08:04:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:04:21,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:21,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:21,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:21,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 08:04:21,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 435036019, now seen corresponding path program 1 times [2022-11-19 08:04:21,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:21,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293961336] [2022-11-19 08:04:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:21,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:21,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:04:21,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360504478] [2022-11-19 08:04:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:21,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:21,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:21,830 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:21,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:04:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:21,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:04:21,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:22,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:04:39,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:39,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293961336] [2022-11-19 08:04:39,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:04:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360504478] [2022-11-19 08:04:39,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360504478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290158993] [2022-11-19 08:04:39,672 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 08:04:39,672 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:39,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:39,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:39,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:39,862 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 70 for LOIs [2022-11-19 08:04:39,977 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2022-11-19 08:04:40,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:51,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [290158993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:51,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:04:51,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 21 [2022-11-19 08:04:51,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146633034] [2022-11-19 08:04:51,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:51,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:04:51,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:04:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:04:51,510 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:53,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:04:56,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:59,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:04:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:59,767 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-11-19 08:04:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:04:59,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2022-11-19 08:04:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:59,770 INFO L225 Difference]: With dead ends: 52 [2022-11-19 08:04:59,771 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 08:04:59,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:04:59,772 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:59,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 106 Invalid, 2 Unknown, 48 Unchecked, 8.2s Time] [2022-11-19 08:04:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 08:04:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 08:04:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 08:04:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-11-19 08:04:59,787 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 20 [2022-11-19 08:04:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:59,787 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-11-19 08:04:59,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-11-19 08:04:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:04:59,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:59,789 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:59,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:59,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:59,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:04:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1915124280, now seen corresponding path program 1 times [2022-11-19 08:04:59,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:59,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394458000] [2022-11-19 08:04:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:59,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:00,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:05:00,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637897834] [2022-11-19 08:05:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:00,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:00,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:00,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:00,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:05:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:00,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:05:00,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:05:00,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:05:35,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:35,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394458000] [2022-11-19 08:05:35,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:05:35,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637897834] [2022-11-19 08:05:35,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637897834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:35,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002424780] [2022-11-19 08:05:35,560 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 08:05:35,560 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:35,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:35,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:35,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:36,561 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 08:05:36,566 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2022-11-19 08:05:36,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:50,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:50,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:50,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:05:50,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-19 08:05:50,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389645511] [2022-11-19 08:05:50,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:50,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:05:50,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:50,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:05:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=540, Unknown=1, NotChecked=0, Total=650 [2022-11-19 08:05:50,274 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:05:52,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:05:53,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:05:54,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:05:58,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:01,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:05,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:07,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:09,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:21,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:23,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:25,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:27,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:29,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:31,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:32,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:35,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:37,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:40,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:42,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:43,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:45,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:47,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:48,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:51,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:54,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:55,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:57,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:06:59,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:01,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:03,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:05,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:07,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:10,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:14,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:14,033 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2022-11-19 08:07:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:07:14,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2022-11-19 08:07:14,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:14,034 INFO L225 Difference]: With dead ends: 53 [2022-11-19 08:07:14,034 INFO L226 Difference]: Without dead ends: 44 [2022-11-19 08:07:14,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=125, Invalid=630, Unknown=1, NotChecked=0, Total=756 [2022-11-19 08:07:14,036 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 29 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:14,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 86 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 252 Invalid, 23 Unknown, 0 Unchecked, 81.5s Time] [2022-11-19 08:07:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-19 08:07:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-19 08:07:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 08:07:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2022-11-19 08:07:14,061 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 22 [2022-11-19 08:07:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:14,062 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2022-11-19 08:07:14,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:07:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2022-11-19 08:07:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:07:14,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:14,063 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:14,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 08:07:14,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:14,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:14,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1707874709, now seen corresponding path program 1 times [2022-11-19 08:07:14,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:14,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610616240] [2022-11-19 08:07:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:14,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:14,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:07:14,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87000964] [2022-11-19 08:07:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:14,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:14,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:14,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:07:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:07:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:07:14,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:24,355 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~q~0#1| Int) (|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) 4294967296) (mod (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) 4294967296))) (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 4294967280) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 12) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 16 |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1| 4294967284) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))) is different from false [2022-11-19 08:07:24,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:24,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610616240] [2022-11-19 08:07:24,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:07:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87000964] [2022-11-19 08:07:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87000964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98288840] [2022-11-19 08:07:24,564 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 08:07:24,564 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:07:24,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:07:24,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:07:24,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:07:25,831 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 08:07:25,838 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2022-11-19 08:07:25,861 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:07:31,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1345#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:07:31,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:07:31,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:07:31,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-11-19 08:07:31,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084463772] [2022-11-19 08:07:31,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 08:07:31,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:07:31,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:31,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:07:31,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=340, Unknown=2, NotChecked=38, Total=462 [2022-11-19 08:07:31,414 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:07:34,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:36,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:38,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:40,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:42,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:44,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:47,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:49,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:51,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 08:07:54,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:07:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:55,846 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-11-19 08:07:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:07:55,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-11-19 08:07:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:55,848 INFO L225 Difference]: With dead ends: 52 [2022-11-19 08:07:55,848 INFO L226 Difference]: Without dead ends: 50 [2022-11-19 08:07:55,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=96, Invalid=412, Unknown=2, NotChecked=42, Total=552 [2022-11-19 08:07:55,849 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 6 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:55,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 75 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 155 Invalid, 9 Unknown, 0 Unchecked, 24.3s Time] [2022-11-19 08:07:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-19 08:07:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-19 08:07:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 19 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 08:07:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-11-19 08:07:55,875 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 27 [2022-11-19 08:07:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:55,876 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-11-19 08:07:55,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:07:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-11-19 08:07:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:07:55,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:55,877 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:55,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:07:56,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:56,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash 54790924, now seen corresponding path program 1 times [2022-11-19 08:07:56,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962210726] [2022-11-19 08:07:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:56,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:07:56,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171304113] [2022-11-19 08:07:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:56,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:56,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:56,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:56,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:07:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:56,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:07:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 08:07:56,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 08:08:05,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962210726] [2022-11-19 08:08:05,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:08:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171304113] [2022-11-19 08:08:05,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171304113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:05,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1725618421] [2022-11-19 08:08:05,180 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 08:08:05,180 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:08:05,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:08:05,181 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:08:05,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:08:37,357 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2022-11-19 08:08:37,384 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2022-11-19 08:08:37,403 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:09:01,554 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:09:43,618 WARN L233 SmtUtils]: Spent 13.86s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:09:45,677 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_#NULL.offset| 0) (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)) (= |c_#NULL.base| 0) (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)) (not (= (ite (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) 1 0) 0)) (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967288 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)) (<= 0 |c_#StackHeapBarrier|)) is different from false [2022-11-19 08:10:36,391 WARN L233 SmtUtils]: Spent 16.40s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:11:18,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1824#(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 [2022-11-19 08:11:18,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:11:18,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:11:18,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-19 08:11:18,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218066986] [2022-11-19 08:11:18,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:11:18,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:11:18,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:18,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:11:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=724, Unknown=30, NotChecked=56, Total=930 [2022-11-19 08:11:18,084 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 08:11:22,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:24,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:26,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:28,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:30,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 08:11:33,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:35,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:38,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:40,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:42,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:44,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:47,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:49,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:51,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:53,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:11:55,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:00,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.96s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-19 08:12:02,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:04,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:06,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:08,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:12:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:08,288 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-11-19 08:12:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:12:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 49 [2022-11-19 08:12:08,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:08,290 INFO L225 Difference]: With dead ends: 73 [2022-11-19 08:12:08,291 INFO L226 Difference]: Without dead ends: 56 [2022-11-19 08:12:08,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 107 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 168.4s TimeCoverageRelationStatistics Valid=134, Invalid=832, Unknown=30, NotChecked=60, Total=1056 [2022-11-19 08:12:08,292 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 81 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:08,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 107 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 269 Invalid, 18 Unknown, 0 Unchecked, 49.9s Time] [2022-11-19 08:12:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-19 08:12:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-11-19 08:12:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 08:12:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-19 08:12:08,312 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 49 [2022-11-19 08:12:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:08,312 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-19 08:12:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 08:12:08,313 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-19 08:12:08,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 08:12:08,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:08,314 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:08,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:08,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:12:08,515 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:08,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2040333908, now seen corresponding path program 2 times [2022-11-19 08:12:08,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:08,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141298176] [2022-11-19 08:12:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:08,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:08,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:08,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693988125] [2022-11-19 08:12:08,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:08,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:08,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:08,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:08,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41a043dd-575e-480a-a957-34a3c055ffec/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:12:08,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:12:08,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:12:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-19 08:12:09,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:46,934 WARN L233 SmtUtils]: Spent 22.85s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:14:16,257 WARN L233 SmtUtils]: Spent 6.78s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 08:14:23,878 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296))) (or (= .cse0 1) (<= .cse0 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296)) (let ((.cse3 (div (mod |c_ULTIMATE.start_main_~p~0#1| 4294967296) 2)) (.cse2 (div .cse0 4))) (let ((.cse1 (<= (mod (+ .cse2 |c_ULTIMATE.start_main_~p~0#1|) 4294967296) (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (.cse4 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~n~0#1| .cse2 16 .cse3)) (.cse6 (* .cse2 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 12)) (.cse7 (* .cse2 |c_ULTIMATE.start_main_~r~0#1| .cse3 4294967280)) (.cse8 (* |c_ULTIMATE.start_main_~n~0#1| .cse2 |c_ULTIMATE.start_main_~p~0#1| 4294967284))) (and (or (not .cse1) (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| .cse2 .cse2 4) (* .cse2 .cse2 12 .cse3) (* .cse2 .cse2 4294967290 |c_ULTIMATE.start_main_~p~0#1|) .cse4 .cse5 (* .cse2 |c_ULTIMATE.start_main_~p~0#1| 16 .cse3) .cse6 .cse7 .cse8 (* 4294967292 .cse2 .cse2 |c_ULTIMATE.start_main_~r~0#1|) (* .cse2 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1| 4294967287)) 4294967296) 0)) (or .cse1 (= (mod (+ (* .cse2 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1| 3) (* .cse2 .cse2 |c_ULTIMATE.start_main_~r~0#1| 12) (* 4294967292 .cse2 .cse2 .cse3) .cse4 (* .cse2 .cse2 |c_ULTIMATE.start_main_~p~0#1| 2) .cse5 (* |c_ULTIMATE.start_main_~n~0#1| .cse2 .cse2 4294967284) .cse6 .cse7 .cse8) 4294967296) 0))))))) is different from true [2022-11-19 08:15:31,935 WARN L233 SmtUtils]: Spent 23.93s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:15:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 2 not checked. [2022-11-19 08:15:51,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141298176] [2022-11-19 08:15:51,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:15:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693988125] [2022-11-19 08:15:51,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693988125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:51,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542770674] [2022-11-19 08:15:51,578 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 08:15:51,578 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:51,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:51,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:51,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:16:17,286 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2022-11-19 08:16:17,315 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2022-11-19 08:16:17,333 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:17:39,944 WARN L233 SmtUtils]: Spent 16.47s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:18:25,479 WARN L233 SmtUtils]: Spent 17.37s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:18:31,238 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_#NULL.offset| 0) (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)) (= |c_#NULL.base| 0) (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0)) (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)) (not (= (ite (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) 1 0) 0)) (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967288 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)) (<= 0 |c_#StackHeapBarrier|)) is different from false