./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:00:11,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:00:11,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:00:11,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:00:11,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:00:11,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:00:11,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:00:11,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:00:11,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:00:11,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:00:11,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:00:11,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:00:11,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:00:11,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:00:11,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:00:11,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:00:11,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:00:11,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:00:11,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:00:11,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:00:11,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:00:11,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:00:11,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:00:11,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:00:11,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:00:11,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:00:11,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:00:11,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:00:11,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:00:11,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:00:11,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:00:11,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:00:11,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:00:11,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:00:11,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:00:11,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:00:11,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:00:11,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:00:11,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:00:11,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:00:11,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:00:11,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:00:11,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:00:11,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:00:11,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:00:11,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:00:11,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:00:11,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:00:11,875 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:00:11,876 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:00:11,876 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:00:11,876 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:00:11,876 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:00:11,877 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:00:11,877 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:00:11,877 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:00:11,878 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:00:11,878 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:00:11,878 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:00:11,879 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:00:11,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:00:11,880 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:00:11,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:00:11,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:00:11,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:00:11,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:00:11,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:00:11,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:00:11,881 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:00:11,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:00:11,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:00:11,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:00:11,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:00:11,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:00:11,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:00:11,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:00:11,883 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:00:11,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:00:11,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:00:11,884 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:00:11,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:00:11,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:00:11,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:00:11,885 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_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca [2022-11-26 01:00:12,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:00:12,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:00:12,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:00:12,229 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:00:12,230 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:00:12,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2022-11-26 01:00:15,210 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:00:15,464 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:00:15,465 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2022-11-26 01:00:15,471 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/data/a4c240578/5f2dbcadc07e4db5a2c78984ceb36cdb/FLAG0ef668cc4 [2022-11-26 01:00:15,486 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/data/a4c240578/5f2dbcadc07e4db5a2c78984ceb36cdb [2022-11-26 01:00:15,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:00:15,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:00:15,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:00:15,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:00:15,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:00:15,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab6498f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15, skipping insertion in model container [2022-11-26 01:00:15,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:00:15,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:00:15,663 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2022-11-26 01:00:15,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:00:15,692 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:00:15,702 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2022-11-26 01:00:15,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:00:15,722 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:00:15,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15 WrapperNode [2022-11-26 01:00:15,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:00:15,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:00:15,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:00:15,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:00:15,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,762 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-26 01:00:15,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:00:15,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:00:15,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:00:15,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:00:15,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,793 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:00:15,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:00:15,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:00:15,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:00:15,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (1/1) ... [2022-11-26 01:00:15,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:00:15,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:15,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:00:15,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:00:15,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:00:15,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:00:15,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:00:15,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:00:15,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 01:00:15,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 01:00:15,986 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:00:15,989 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:00:16,260 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:00:16,397 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:00:16,397 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:00:16,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:00:16 BoogieIcfgContainer [2022-11-26 01:00:16,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:00:16,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:00:16,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:00:16,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:00:16,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:00:15" (1/3) ... [2022-11-26 01:00:16,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8d048d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:00:16, skipping insertion in model container [2022-11-26 01:00:16,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:15" (2/3) ... [2022-11-26 01:00:16,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f8d048d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:00:16, skipping insertion in model container [2022-11-26 01:00:16,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:00:16" (3/3) ... [2022-11-26 01:00:16,413 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.c [2022-11-26 01:00:16,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:00:16,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:00:16,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:00:16,511 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;@1f6a1c2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:00:16,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:00:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:00:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:00:16,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:16,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:00:16,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1275866824, now seen corresponding path program 1 times [2022-11-26 01:00:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:16,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663255230] [2022-11-26 01:00:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:16,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:16,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:16,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663255230] [2022-11-26 01:00:16,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-26 01:00:16,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820906433] [2022-11-26 01:00:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:16,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:16,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:16,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:00:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:16,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-26 01:00:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:16,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:16,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820906433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:16,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:00:16,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:00:16,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121575853] [2022-11-26 01:00:16,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:16,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 01:00:16,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 01:00:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:00:16,933 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:16,993 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-26 01:00:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 01:00:16,996 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:00:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:17,004 INFO L225 Difference]: With dead ends: 29 [2022-11-26 01:00:17,004 INFO L226 Difference]: Without dead ends: 13 [2022-11-26 01:00:17,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:00:17,010 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:17,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:00:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-26 01:00:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-26 01:00:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-26 01:00:17,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2022-11-26 01:00:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:17,047 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-26 01:00:17,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-26 01:00:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:00:17,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:17,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:17,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 01:00:17,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:17,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1770432352, now seen corresponding path program 1 times [2022-11-26 01:00:17,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:17,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499464636] [2022-11-26 01:00:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:17,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:17,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:17,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499464636] [2022-11-26 01:00:17,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-26 01:00:17,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175834816] [2022-11-26 01:00:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:17,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:17,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:17,286 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:17,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:00:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:17,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:00:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:17,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:17,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175834816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:17,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:00:17,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:00:17,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812027172] [2022-11-26 01:00:17,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:17,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:00:17,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:00:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:00:17,444 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:17,494 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-26 01:00:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:00:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 01:00:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:17,496 INFO L225 Difference]: With dead ends: 23 [2022-11-26 01:00:17,496 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 01:00:17,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:00:17,498 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:17,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:00:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 01:00:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-26 01:00:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-26 01:00:17,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2022-11-26 01:00:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:17,512 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-26 01:00:17,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-26 01:00:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:00:17,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:17,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:17,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:17,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:17,721 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1768644892, now seen corresponding path program 1 times [2022-11-26 01:00:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:17,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3667037] [2022-11-26 01:00:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:17,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:17,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:17,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912907219] [2022-11-26 01:00:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:17,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:17,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:17,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:17,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:00:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:00:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:17,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:17,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:17,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3667037] [2022-11-26 01:00:17,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:00:17,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912907219] [2022-11-26 01:00:17,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912907219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:17,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:00:17,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:00:17,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401131354] [2022-11-26 01:00:17,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:17,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:00:17,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:00:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:00:17,968 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:18,054 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-26 01:00:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:00:18,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 01:00:18,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:18,056 INFO L225 Difference]: With dead ends: 25 [2022-11-26 01:00:18,056 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 01:00:18,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:00:18,058 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:18,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:00:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 01:00:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-26 01:00:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 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) [2022-11-26 01:00:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-26 01:00:18,068 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2022-11-26 01:00:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:18,068 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-26 01:00:18,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-26 01:00:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 01:00:18,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:18,070 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:18,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:18,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:18,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:18,278 INFO L85 PathProgramCache]: Analyzing trace with hash 167458353, now seen corresponding path program 1 times [2022-11-26 01:00:18,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:18,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914180310] [2022-11-26 01:00:18,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:18,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:18,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:18,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853657448] [2022-11-26 01:00:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:18,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:18,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:18,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:18,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:00:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 01:00:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:18,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:19,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:19,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914180310] [2022-11-26 01:00:19,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:00:19,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853657448] [2022-11-26 01:00:19,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853657448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:19,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425399199] [2022-11-26 01:00:19,035 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:00:19,036 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:19,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:19,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:19,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:00:19,312 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-26 01:00:19,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:20,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [425399199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:20,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:00:20,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2022-11-26 01:00:20,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276843620] [2022-11-26 01:00:20,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:20,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:00:20,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:20,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:00:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:00:20,287 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 01:00:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:20,437 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-26 01:00:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:00:20,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-26 01:00:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:20,447 INFO L225 Difference]: With dead ends: 29 [2022-11-26 01:00:20,447 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 01:00:20,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:00:20,456 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:20,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:00:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 01:00:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-26 01:00:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:00:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-26 01:00:20,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2022-11-26 01:00:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:20,475 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-26 01:00:20,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 01:00:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-26 01:00:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:00:20,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:20,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:20,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:20,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:20,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1288276564, now seen corresponding path program 1 times [2022-11-26 01:00:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:20,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057176008] [2022-11-26 01:00:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:20,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:20,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551729525] [2022-11-26 01:00:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:20,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:20,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:20,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:00:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:00:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:20,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:20,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057176008] [2022-11-26 01:00:20,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:00:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551729525] [2022-11-26 01:00:20,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551729525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:20,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1947514057] [2022-11-26 01:00:20,834 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:00:20,834 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:20,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:20,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:20,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:00:21,791 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2022-11-26 01:00:21,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:22,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '509#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:00:22,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:22,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:00:22,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-26 01:00:22,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741330040] [2022-11-26 01:00:22,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:00:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:00:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:00:22,698 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:22,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:22,815 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-11-26 01:00:22,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:00:22,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-26 01:00:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:22,817 INFO L225 Difference]: With dead ends: 55 [2022-11-26 01:00:22,817 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 01:00:22,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:00:22,818 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:22,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:00:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 01:00:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-11-26 01:00:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-26 01:00:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-11-26 01:00:22,829 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2022-11-26 01:00:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:22,830 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-11-26 01:00:22,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-11-26 01:00:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 01:00:22,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:22,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:22,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:23,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:23,032 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1286489104, now seen corresponding path program 1 times [2022-11-26 01:00:23,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:23,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838618399] [2022-11-26 01:00:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:23,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:23,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:23,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717485988] [2022-11-26 01:00:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:23,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:23,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:23,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:23,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:00:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:23,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 01:00:23,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:24,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:24,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838618399] [2022-11-26 01:00:24,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:00:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717485988] [2022-11-26 01:00:24,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717485988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574851151] [2022-11-26 01:00:24,785 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 01:00:24,785 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:24,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:24,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:24,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:00:25,622 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2022-11-26 01:00:25,665 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:26,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '758#(and (< ~counter~0 21) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:00:26,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:26,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:00:26,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-26 01:00:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925906859] [2022-11-26 01:00:26,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:26,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 01:00:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 01:00:26,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:00:26,778 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:27,232 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-11-26 01:00:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:00:27,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-26 01:00:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:27,235 INFO L225 Difference]: With dead ends: 57 [2022-11-26 01:00:27,235 INFO L226 Difference]: Without dead ends: 55 [2022-11-26 01:00:27,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:00:27,236 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:27,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:00:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-26 01:00:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-11-26 01:00:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 01:00:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-26 01:00:27,254 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 15 [2022-11-26 01:00:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:27,255 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-26 01:00:27,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-26 01:00:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 01:00:27,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:27,256 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:27,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:27,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 01:00:27,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:27,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1954110013, now seen corresponding path program 1 times [2022-11-26 01:00:27,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:27,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081038505] [2022-11-26 01:00:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:27,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:27,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:27,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742955726] [2022-11-26 01:00:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:27,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:27,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:27,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:00:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:27,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:00:27,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:00:27,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:00:27,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081038505] [2022-11-26 01:00:27,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:00:27,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742955726] [2022-11-26 01:00:27,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742955726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:27,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990862131] [2022-11-26 01:00:27,859 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:00:27,859 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:27,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:27,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:27,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:00:28,612 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 61 for LOIs [2022-11-26 01:00:28,842 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:31,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1041#(and (< ~counter~0 21) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:00:31,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:31,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:00:31,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-26 01:00:31,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505897629] [2022-11-26 01:00:31,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:31,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:00:31,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:00:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:00:31,779 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 01:00:31,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:31,934 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-26 01:00:31,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:00:31,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-11-26 01:00:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:31,936 INFO L225 Difference]: With dead ends: 50 [2022-11-26 01:00:31,936 INFO L226 Difference]: Without dead ends: 48 [2022-11-26 01:00:31,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:00:31,938 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:31,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 43 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:00:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-26 01:00:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-26 01:00:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 01:00:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-11-26 01:00:31,951 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2022-11-26 01:00:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:31,952 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-11-26 01:00:31,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 01:00:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-11-26 01:00:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 01:00:31,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:31,953 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:31,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:00:32,159 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2145344073, now seen corresponding path program 1 times [2022-11-26 01:00:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:32,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128528035] [2022-11-26 01:00:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:32,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:32,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862366273] [2022-11-26 01:00:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:32,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:32,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:32,183 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:32,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:00:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:00:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:00:33,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:00:33,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:33,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128528035] [2022-11-26 01:00:33,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:00:33,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862366273] [2022-11-26 01:00:33,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862366273] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:33,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:00:33,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-11-26 01:00:33,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369767538] [2022-11-26 01:00:33,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:00:33,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:33,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:00:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:00:33,229 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:33,275 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-26 01:00:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:00:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-26 01:00:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:33,276 INFO L225 Difference]: With dead ends: 55 [2022-11-26 01:00:33,276 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 01:00:33,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:00:33,277 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:33,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:00:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 01:00:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-26 01:00:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 01:00:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-26 01:00:33,289 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 26 [2022-11-26 01:00:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:33,289 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-26 01:00:33,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-26 01:00:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 01:00:33,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:33,290 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-26 01:00:33,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:33,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:33,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:33,497 INFO L85 PathProgramCache]: Analyzing trace with hash 542049488, now seen corresponding path program 2 times [2022-11-26 01:00:33,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:33,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561996399] [2022-11-26 01:00:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:33,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:33,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181894193] [2022-11-26 01:00:33,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:00:33,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:33,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:33,513 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:33,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:00:33,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 01:00:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:00:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:34,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:00:34,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:34,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561996399] [2022-11-26 01:00:34,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:00:34,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181894193] [2022-11-26 01:00:34,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181894193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:34,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868826383] [2022-11-26 01:00:34,199 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:00:34,199 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:34,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:34,200 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:34,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:00:34,910 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2022-11-26 01:00:35,022 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:36,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1728#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-26 01:00:36,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:36,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:00:36,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-26 01:00:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111462222] [2022-11-26 01:00:36,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:36,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 01:00:36,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 01:00:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:00:36,568 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 01:00:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:36,844 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-11-26 01:00:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:00:36,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2022-11-26 01:00:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:36,846 INFO L225 Difference]: With dead ends: 99 [2022-11-26 01:00:36,846 INFO L226 Difference]: Without dead ends: 91 [2022-11-26 01:00:36,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:00:36,847 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:36,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 110 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:00:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-26 01:00:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-26 01:00:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 01:00:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-11-26 01:00:36,864 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 39 [2022-11-26 01:00:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:36,865 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-11-26 01:00:36,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 01:00:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-11-26 01:00:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 01:00:36,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:36,867 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-26 01:00:36,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:37,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:37,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:37,075 INFO L85 PathProgramCache]: Analyzing trace with hash 11378456, now seen corresponding path program 3 times [2022-11-26 01:00:37,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:37,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010903753] [2022-11-26 01:00:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:37,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:37,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464061601] [2022-11-26 01:00:37,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:00:37,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:37,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:37,095 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:37,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:00:37,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:00:37,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:37,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 01:00:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:37,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 01:00:37,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:37,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010903753] [2022-11-26 01:00:37,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:00:37,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464061601] [2022-11-26 01:00:37,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464061601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:37,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581827043] [2022-11-26 01:00:37,981 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:00:37,981 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:37,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:37,982 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:37,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:00:38,684 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2022-11-26 01:00:38,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:40,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2556#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-26 01:00:40,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:40,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:00:40,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-11-26 01:00:40,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62224299] [2022-11-26 01:00:40,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:40,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 01:00:40,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:40,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 01:00:40,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:00:40,022 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-26 01:00:40,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:40,627 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2022-11-26 01:00:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-26 01:00:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 87 [2022-11-26 01:00:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:40,631 INFO L225 Difference]: With dead ends: 179 [2022-11-26 01:00:40,632 INFO L226 Difference]: Without dead ends: 171 [2022-11-26 01:00:40,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 01:00:40,634 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:40,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 141 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:00:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-26 01:00:40,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-26 01:00:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 127 states have (on average 1.015748031496063) internal successors, (129), 128 states have internal predecessors, (129), 22 states have call successors, (22), 21 states have call predecessors, (22), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-26 01:00:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2022-11-26 01:00:40,663 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 87 [2022-11-26 01:00:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:40,663 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2022-11-26 01:00:40,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-11-26 01:00:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2022-11-26 01:00:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-26 01:00:40,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:40,666 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2022-11-26 01:00:40,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:00:40,875 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1229338000, now seen corresponding path program 4 times [2022-11-26 01:00:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872507537] [2022-11-26 01:00:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:40,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:40,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:00:40,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477952095] [2022-11-26 01:00:40,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:00:40,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:40,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:40,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:40,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:00:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2022-11-26 01:00:41,404 WARN L124 FreeRefinementEngine]: Strategy SIFA_TAIPAN was unsuccessful and could not determine trace feasibility [2022-11-26 01:00:41,405 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2022-11-26 01:00:41,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 01:00:41,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:41,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:00:41,617 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:41,620 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 01:00:41,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 01:00:41 BoogieIcfgContainer [2022-11-26 01:00:41,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 01:00:41,667 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 01:00:41,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 01:00:41,668 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 01:00:41,668 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:00:16" (3/4) ... [2022-11-26 01:00:41,671 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-26 01:00:41,672 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 01:00:41,672 INFO L158 Benchmark]: Toolchain (without parser) took 26182.13ms. Allocated memory was 127.9MB in the beginning and 237.0MB in the end (delta: 109.1MB). Free memory was 96.7MB in the beginning and 93.0MB in the end (delta: 3.7MB). Peak memory consumption was 115.2MB. Max. memory is 16.1GB. [2022-11-26 01:00:41,672 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 127.9MB. Free memory is still 100.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:00:41,673 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.44ms. Allocated memory is still 127.9MB. Free memory was 96.7MB in the beginning and 85.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 01:00:41,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.45ms. Allocated memory is still 127.9MB. Free memory was 85.9MB in the beginning and 84.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:00:41,674 INFO L158 Benchmark]: Boogie Preprocessor took 34.14ms. Allocated memory is still 127.9MB. Free memory was 84.1MB in the beginning and 83.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:00:41,674 INFO L158 Benchmark]: RCFGBuilder took 601.68ms. Allocated memory is still 127.9MB. Free memory was 83.0MB in the beginning and 65.0MB in the end (delta: 18.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-26 01:00:41,675 INFO L158 Benchmark]: TraceAbstraction took 25265.19ms. Allocated memory was 127.9MB in the beginning and 237.0MB in the end (delta: 109.1MB). Free memory was 64.6MB in the beginning and 93.0MB in the end (delta: -28.5MB). Peak memory consumption was 83.7MB. Max. memory is 16.1GB. [2022-11-26 01:00:41,675 INFO L158 Benchmark]: Witness Printer took 4.31ms. Allocated memory is still 237.0MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:00:41,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 127.9MB. Free memory is still 100.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 231.44ms. Allocated memory is still 127.9MB. Free memory was 96.7MB in the beginning and 85.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.45ms. Allocated memory is still 127.9MB. Free memory was 85.9MB in the beginning and 84.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.14ms. Allocated memory is still 127.9MB. Free memory was 84.1MB in the beginning and 83.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 601.68ms. Allocated memory is still 127.9MB. Free memory was 83.0MB in the beginning and 65.0MB in the end (delta: 18.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 25265.19ms. Allocated memory was 127.9MB in the beginning and 237.0MB in the end (delta: 109.1MB). Free memory was 64.6MB in the beginning and 93.0MB in the end (delta: -28.5MB). Peak memory consumption was 83.7MB. Max. memory is 16.1GB. * Witness Printer took 4.31ms. Allocated memory is still 237.0MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND TRUE !cond [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND FALSE !(a % 2 == 0 && b % 2 == 0) [L43] COND TRUE a % 2 == 1 && b % 2 == 0 [L44] a = a - 1 [L45] q = q + b * p [L33] EXPR counter++ [L33] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(q == (long long) x * y) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.1s, OverallIterations: 11, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 187 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 179 mSDsluCounter, 590 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 438 mSDsCounter, 33 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 549 IncrementalHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 33 mSolverCounterUnsat, 152 mSDtfsCounter, 549 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 662 GetRequests, 483 SyntacticMatches, 6 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 10.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=10, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 416 NumberOfCodeBlocks, 416 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 435 ConstructedInterpolants, 2 QuantifiedInterpolants, 1829 SizeOfPredicates, 51 NumberOfNonLiveVariables, 921 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 329/1018 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 66, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-26 01:00:41,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:00:44,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:00:44,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:00:44,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:00:44,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:00:44,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:00:44,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:00:44,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:00:44,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:00:44,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:00:44,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:00:44,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:00:44,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:00:44,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:00:44,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:00:44,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:00:44,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:00:44,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:00:44,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:00:44,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:00:44,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:00:44,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:00:44,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:00:44,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:00:44,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:00:44,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:00:44,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:00:44,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:00:44,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:00:44,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:00:44,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:00:44,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:00:44,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:00:44,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:00:44,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:00:44,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:00:44,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:00:44,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:00:44,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:00:44,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:00:44,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:00:44,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-26 01:00:44,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:00:44,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:00:44,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:00:44,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:00:44,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:00:44,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:00:44,212 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:00:44,212 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:00:44,212 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:00:44,212 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:00:44,213 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:00:44,214 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:00:44,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:00:44,215 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:00:44,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:00:44,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:00:44,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:00:44,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:00:44,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:00:44,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:00:44,216 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 01:00:44,217 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 01:00:44,217 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:00:44,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:00:44,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:00:44,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:00:44,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:00:44,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 01:00:44,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:00:44,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:00:44,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:00:44,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:00:44,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:00:44,219 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 01:00:44,220 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 01:00:44,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:00:44,220 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:00:44,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 01:00:44,220 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca [2022-11-26 01:00:44,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:00:44,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:00:44,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:00:44,628 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:00:44,628 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:00:44,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2022-11-26 01:00:47,695 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:00:47,954 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:00:47,954 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2022-11-26 01:00:47,972 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/data/003951c91/ad7c6714ccc942d5a76ac72e7c61a540/FLAG8af7a3155 [2022-11-26 01:00:47,991 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/data/003951c91/ad7c6714ccc942d5a76ac72e7c61a540 [2022-11-26 01:00:47,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:00:47,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:00:48,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:00:48,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:00:48,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:00:48,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:00:47" (1/1) ... [2022-11-26 01:00:48,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85031ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48, skipping insertion in model container [2022-11-26 01:00:48,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:00:47" (1/1) ... [2022-11-26 01:00:48,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:00:48,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:00:48,220 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2022-11-26 01:00:48,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:00:48,258 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:00:48,277 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2022-11-26 01:00:48,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:00:48,302 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:00:48,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48 WrapperNode [2022-11-26 01:00:48,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:00:48,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:00:48,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:00:48,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:00:48,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,339 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2022-11-26 01:00:48,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:00:48,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:00:48,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:00:48,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:00:48,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,364 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:00:48,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:00:48,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:00:48,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:00:48,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (1/1) ... [2022-11-26 01:00:48,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:00:48,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:48,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:00:48,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:00:48,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:00:48,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 01:00:48,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:00:48,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:00:48,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 01:00:48,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 01:00:48,543 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:00:48,545 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:00:49,508 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:00:49,514 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:00:49,514 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:00:49,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:00:49 BoogieIcfgContainer [2022-11-26 01:00:49,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:00:49,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:00:49,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:00:49,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:00:49,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:00:47" (1/3) ... [2022-11-26 01:00:49,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcba559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:00:49, skipping insertion in model container [2022-11-26 01:00:49,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:00:48" (2/3) ... [2022-11-26 01:00:49,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcba559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:00:49, skipping insertion in model container [2022-11-26 01:00:49,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:00:49" (3/3) ... [2022-11-26 01:00:49,524 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.c [2022-11-26 01:00:49,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:00:49,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:00:49,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:00:49,595 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;@30950cfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:00:49,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:00:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:00:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:00:49,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:49,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:49,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2022-11-26 01:00:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:00:49,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067300897] [2022-11-26 01:00:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:49,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:00:49,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:00:49,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:00:49,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 01:00:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-26 01:00:49,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:49,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:49,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:00:49,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067300897] [2022-11-26 01:00:49,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067300897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:49,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:00:49,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:00:49,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35336140] [2022-11-26 01:00:49,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:49,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 01:00:49,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:00:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 01:00:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:00:49,831 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:49,857 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-11-26 01:00:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 01:00:49,860 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 01:00:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:49,867 INFO L225 Difference]: With dead ends: 43 [2022-11-26 01:00:49,867 INFO L226 Difference]: Without dead ends: 19 [2022-11-26 01:00:49,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:00:49,876 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:49,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:00:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-26 01:00:49,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-26 01:00:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-26 01:00:49,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2022-11-26 01:00:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:49,917 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-26 01:00:49,918 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:49,918 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-26 01:00:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:00:49,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:49,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:49,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:50,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:00:50,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:50,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2022-11-26 01:00:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:00:50,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465898742] [2022-11-26 01:00:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:50,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:00:50,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:00:50,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:00:50,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 01:00:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:00:50,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:00:50,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:50,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:00:50,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465898742] [2022-11-26 01:00:50,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465898742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:50,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:00:50,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:00:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378654617] [2022-11-26 01:00:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:50,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:00:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:00:50,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:00:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:00:50,283 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:50,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:50,307 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-11-26 01:00:50,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:00:50,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 01:00:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:50,309 INFO L225 Difference]: With dead ends: 29 [2022-11-26 01:00:50,309 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 01:00:50,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:00:50,311 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:50,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:00:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 01:00:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-26 01:00:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 01:00:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-26 01:00:50,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2022-11-26 01:00:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:50,318 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-26 01:00:50,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:00:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-26 01:00:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:00:50,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:50,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:50,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-26 01:00:50,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:00:50,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:50,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2022-11-26 01:00:50,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:00:50,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865994181] [2022-11-26 01:00:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:50,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:00:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:00:50,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:00:50,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70118394-0c1e-4816-b66c-4d8de64741a1/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process