./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f78eb3bd6243e56025d38ea44716c81630a57505e69e1c5e81a8ab68f6ac9a28 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:35:59,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:35:59,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:35:59,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:35:59,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:35:59,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:35:59,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:35:59,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:35:59,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:35:59,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:35:59,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:35:59,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:35:59,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:35:59,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:35:59,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:35:59,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:35:59,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:35:59,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:35:59,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:35:59,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:35:59,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:35:59,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:35:59,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:35:59,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:35:59,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:35:59,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:35:59,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:35:59,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:35:59,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:35:59,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:35:59,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:35:59,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:35:59,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:35:59,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:35:59,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:35:59,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:35:59,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:35:59,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:35:59,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:35:59,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:35:59,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:35:59,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:35:59,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:35:59,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:35:59,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:35:59,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:35:59,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:35:59,990 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:35:59,990 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:35:59,990 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:35:59,990 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:35:59,991 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:35:59,991 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:35:59,991 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:35:59,991 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:35:59,991 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:35:59,992 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:35:59,992 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:35:59,992 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:35:59,992 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:35:59,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:35:59,993 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:35:59,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:35:59,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:35:59,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:35:59,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:35:59,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:35:59,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:35:59,995 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:35:59,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:35:59,995 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:35:59,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:35:59,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:35:59,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:35:59,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:35:59,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:35:59,996 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:35:59,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:35:59,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:35:59,997 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:35:59,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:35:59,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:35:59,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:35:59,997 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_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78eb3bd6243e56025d38ea44716c81630a57505e69e1c5e81a8ab68f6ac9a28 [2022-12-14 12:36:00,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:36:00,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:36:00,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:36:00,208 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:36:00,208 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:36:00,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c [2022-12-14 12:36:02,769 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:36:02,884 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:36:02,884 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c [2022-12-14 12:36:02,888 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/data/a27241c78/1dde22279a704ed1973c607d7b578aab/FLAG69b0ca95d [2022-12-14 12:36:02,899 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/data/a27241c78/1dde22279a704ed1973c607d7b578aab [2022-12-14 12:36:02,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:36:02,902 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:36:02,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:36:02,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:36:02,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:36:02,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:36:02" (1/1) ... [2022-12-14 12:36:02,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108f68f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:02, skipping insertion in model container [2022-12-14 12:36:02,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:36:02" (1/1) ... [2022-12-14 12:36:02,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:36:02,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:36:03,030 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_072fa999-66c0-4810-a2b9-3e0a67e9d65a/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c[712,725] [2022-12-14 12:36:03,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:36:03,048 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:36:03,057 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_072fa999-66c0-4810-a2b9-3e0a67e9d65a/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c[712,725] [2022-12-14 12:36:03,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:36:03,070 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:36:03,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03 WrapperNode [2022-12-14 12:36:03,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:36:03,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:36:03,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:36:03,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:36:03,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,094 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2022-12-14 12:36:03,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:36:03,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:36:03,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:36:03,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:36:03,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,109 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:36:03,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:36:03,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:36:03,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:36:03,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (1/1) ... [2022-12-14 12:36:03,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:36:03,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:36:03,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:36:03,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:36:03,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:36:03,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:36:03,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:36:03,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:36:03,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:36:03,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:36:03,232 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:36:03,234 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:36:03,319 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:36:03,333 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:36:03,333 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 12:36:03,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:36:03 BoogieIcfgContainer [2022-12-14 12:36:03,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:36:03,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:36:03,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:36:03,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:36:03,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:36:02" (1/3) ... [2022-12-14 12:36:03,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3a51a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:36:03, skipping insertion in model container [2022-12-14 12:36:03,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:03" (2/3) ... [2022-12-14 12:36:03,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3a51a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:36:03, skipping insertion in model container [2022-12-14 12:36:03,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:36:03" (3/3) ... [2022-12-14 12:36:03,345 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound100.c [2022-12-14 12:36:03,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:36:03,365 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:36:03,415 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:36:03,421 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;@7ad86d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:36:03,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:36:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:36:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:36:03,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:36:03,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 12:36:03,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:36:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:36:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2138246143, now seen corresponding path program 1 times [2022-12-14 12:36:03,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:36:03,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386842023] [2022-12-14 12:36:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:03,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:36:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:36:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:36:03,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:36:03,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386842023] [2022-12-14 12:36:03,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386842023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:36:03,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:36:03,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:36:03,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093210417] [2022-12-14 12:36:03,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:36:03,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 12:36:03,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:36:03,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 12:36:03,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:36:03,631 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-12-14 12:36:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:36:03,650 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-12-14 12:36:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 12:36:03,652 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 [2022-12-14 12:36:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:36:03,656 INFO L225 Difference]: With dead ends: 27 [2022-12-14 12:36:03,657 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 12:36:03,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:36:03,663 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:36:03,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:36:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 12:36:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 12:36:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-12-14 12:36:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-14 12:36:03,692 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-12-14 12:36:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:36:03,693 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-14 12:36:03,693 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) [2022-12-14 12:36:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-14 12:36:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:36:03,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:36:03,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:36:03,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:36:03,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:36:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:36:03,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1461620770, now seen corresponding path program 1 times [2022-12-14 12:36:03,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:36:03,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320323801] [2022-12-14 12:36:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:03,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:36:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:36:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:36:03,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:36:03,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320323801] [2022-12-14 12:36:03,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320323801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:36:03,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:36:03,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:36:03,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117447032] [2022-12-14 12:36:03,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:36:03,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:36:03,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:36:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:36:03,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:36:03,792 INFO L87 Difference]: Start difference. First operand 12 states and 14 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) [2022-12-14 12:36:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:36:03,808 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-12-14 12:36:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:36:03,809 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 [2022-12-14 12:36:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:36:03,809 INFO L225 Difference]: With dead ends: 21 [2022-12-14 12:36:03,809 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 12:36:03,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:36:03,810 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:36:03,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:36:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 12:36:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 12:36:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-12-14 12:36:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 12:36:03,814 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2022-12-14 12:36:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:36:03,814 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 12:36:03,814 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) [2022-12-14 12:36:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 12:36:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:36:03,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:36:03,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:36:03,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:36:03,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:36:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:36:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1463408230, now seen corresponding path program 1 times [2022-12-14 12:36:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:36:03,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618915783] [2022-12-14 12:36:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:36:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:36:03,825 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:36:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:36:03,844 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:36:03,844 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:36:03,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 12:36:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:36:03,849 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 12:36:03,852 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 12:36:03,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 12:36:03 BoogieIcfgContainer [2022-12-14 12:36:03,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 12:36:03,865 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 12:36:03,865 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 12:36:03,866 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 12:36:03,866 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:36:03" (3/4) ... [2022-12-14 12:36:03,868 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 12:36:03,868 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 12:36:03,869 INFO L158 Benchmark]: Toolchain (without parser) took 967.14ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 94.8MB in the beginning and 119.0MB in the end (delta: -24.2MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. [2022-12-14 12:36:03,869 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 136.3MB. Free memory is still 77.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:36:03,870 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.01ms. Allocated memory is still 136.3MB. Free memory was 94.3MB in the beginning and 84.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 12:36:03,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.60ms. Allocated memory is still 136.3MB. Free memory was 84.3MB in the beginning and 82.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:36:03,870 INFO L158 Benchmark]: Boogie Preprocessor took 15.04ms. Allocated memory is still 136.3MB. Free memory was 82.7MB in the beginning and 81.7MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:36:03,871 INFO L158 Benchmark]: RCFGBuilder took 225.30ms. Allocated memory is still 136.3MB. Free memory was 81.2MB in the beginning and 71.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 12:36:03,871 INFO L158 Benchmark]: TraceAbstraction took 526.22ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 70.7MB in the beginning and 119.0MB in the end (delta: -48.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:36:03,871 INFO L158 Benchmark]: Witness Printer took 3.15ms. Allocated memory is still 163.6MB. Free memory is still 119.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:36:03,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 136.3MB. Free memory is still 77.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.01ms. Allocated memory is still 136.3MB. Free memory was 94.3MB in the beginning and 84.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.60ms. Allocated memory is still 136.3MB. Free memory was 84.3MB in the beginning and 82.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.04ms. Allocated memory is still 136.3MB. Free memory was 82.7MB in the beginning and 81.7MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 225.30ms. Allocated memory is still 136.3MB. Free memory was 81.2MB in the beginning and 71.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 526.22ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 70.7MB in the beginning and 119.0MB in the end (delta: -48.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.15ms. Allocated memory is still 163.6MB. Free memory is still 119.0MB. 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: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [counter=0, r=0] [L32] EXPR counter++ VAL [counter=1, counter++=0, r=0] [L32] COND TRUE counter++<100 [L33] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 25 mSDtfsCounter, 11 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 12:36:03,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f78eb3bd6243e56025d38ea44716c81630a57505e69e1c5e81a8ab68f6ac9a28 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:36:05,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:36:05,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:36:05,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:36:05,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:36:05,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:36:05,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:36:05,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:36:05,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:36:05,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:36:05,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:36:05,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:36:05,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:36:05,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:36:05,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:36:05,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:36:05,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:36:05,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:36:05,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:36:05,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:36:05,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:36:05,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:36:05,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:36:05,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:36:05,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:36:05,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:36:05,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:36:05,490 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:36:05,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:36:05,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:36:05,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:36:05,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:36:05,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:36:05,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:36:05,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:36:05,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:36:05,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:36:05,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:36:05,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:36:05,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:36:05,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:36:05,496 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 12:36:05,513 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:36:05,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:36:05,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:36:05,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:36:05,514 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:36:05,514 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:36:05,514 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:36:05,514 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:36:05,514 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:36:05,515 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:36:05,515 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:36:05,515 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:36:05,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:36:05,515 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 12:36:05,516 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:36:05,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:36:05,517 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:36:05,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:36:05,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:36:05,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 12:36:05,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:36:05,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:36:05,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:36:05,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:36:05,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:36:05,518 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 12:36:05,518 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 12:36:05,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:36:05,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:36:05,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 12:36:05,518 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_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78eb3bd6243e56025d38ea44716c81630a57505e69e1c5e81a8ab68f6ac9a28 [2022-12-14 12:36:05,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:36:05,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:36:05,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:36:05,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:36:05,745 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:36:05,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c [2022-12-14 12:36:08,349 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:36:08,523 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:36:08,524 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c [2022-12-14 12:36:08,529 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/data/34ce911f2/7a93820862774da68f829cb11ccf2c92/FLAG1f30156e3 [2022-12-14 12:36:08,906 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/data/34ce911f2/7a93820862774da68f829cb11ccf2c92 [2022-12-14 12:36:08,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:36:08,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:36:08,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:36:08,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:36:08,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:36:08,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:36:08" (1/1) ... [2022-12-14 12:36:08,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@604f9e1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:08, skipping insertion in model container [2022-12-14 12:36:08,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:36:08" (1/1) ... [2022-12-14 12:36:08,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:36:08,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:36:09,028 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_072fa999-66c0-4810-a2b9-3e0a67e9d65a/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c[712,725] [2022-12-14 12:36:09,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:36:09,048 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:36:09,057 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_072fa999-66c0-4810-a2b9-3e0a67e9d65a/sv-benchmarks/c/nla-digbench-scaling/freire1_unwindbound100.c[712,725] [2022-12-14 12:36:09,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:36:09,071 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:36:09,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09 WrapperNode [2022-12-14 12:36:09,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:36:09,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:36:09,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:36:09,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:36:09,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,096 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2022-12-14 12:36:09,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:36:09,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:36:09,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:36:09,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:36:09,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,113 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:36:09,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:36:09,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:36:09,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:36:09,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (1/1) ... [2022-12-14 12:36:09,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:36:09,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:36:09,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:36:09,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:36:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:36:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 12:36:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:36:09,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:36:09,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:36:09,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:36:09,232 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:36:09,234 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:36:10,159 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:36:10,164 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:36:10,164 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 12:36:10,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:36:10 BoogieIcfgContainer [2022-12-14 12:36:10,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:36:10,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:36:10,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:36:10,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:36:10,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:36:08" (1/3) ... [2022-12-14 12:36:10,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3ff3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:36:10, skipping insertion in model container [2022-12-14 12:36:10,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:36:09" (2/3) ... [2022-12-14 12:36:10,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3ff3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:36:10, skipping insertion in model container [2022-12-14 12:36:10,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:36:10" (3/3) ... [2022-12-14 12:36:10,172 INFO L112 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound100.c [2022-12-14 12:36:10,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:36:10,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:36:10,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:36:10,229 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;@3e6eb089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:36:10,229 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:36:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:36:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 12:36:10,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:36:10,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:36:10,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:36:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:36:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1819757606, now seen corresponding path program 1 times [2022-12-14 12:36:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:36:10,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279787327] [2022-12-14 12:36:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:10,251 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 [2022-12-14 12:36:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:36:10,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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) [2022-12-14 12:36:10,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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 [2022-12-14 12:36:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:36:10,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 12:36:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:36:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:36:10,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:36:10,639 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:36:10,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279787327] [2022-12-14 12:36:10,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279787327] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:36:10,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:36:10,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:36:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316228515] [2022-12-14 12:36:10,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:36:10,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 12:36:10,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:36:10,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 12:36:10,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:36:10,664 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:36:10,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:36:10,677 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-12-14 12:36:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 12:36:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 12:36:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:36:10,683 INFO L225 Difference]: With dead ends: 32 [2022-12-14 12:36:10,683 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 12:36:10,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:36:10,687 INFO L413 NwaCegarLoop]: 19 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, 19 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 [2022-12-14 12:36:10,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:36:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 12:36:10,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 12:36:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2022-12-14 12:36:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 12:36:10,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-12-14 12:36:10,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:36:10,711 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 12:36:10,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:36:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 12:36:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:36:10,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:36:10,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:36:10,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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 [2022-12-14 12:36:10,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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 [2022-12-14 12:36:10,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:36:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:36:10,916 INFO L85 PathProgramCache]: Analyzing trace with hash 178410715, now seen corresponding path program 1 times [2022-12-14 12:36:10,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:36:10,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059903858] [2022-12-14 12:36:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:10,919 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 [2022-12-14 12:36:10,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:36:10,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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) [2022-12-14 12:36:10,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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 [2022-12-14 12:36:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:36:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:36:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:36:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:36:11,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:36:11,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:36:11,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059903858] [2022-12-14 12:36:11,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059903858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:36:11,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:36:11,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:36:11,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682105507] [2022-12-14 12:36:11,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:36:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:36:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:36:11,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:36:11,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:36:11,330 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:36:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:36:12,302 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-12-14 12:36:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:36:12,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-12-14 12:36:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:36:12,303 INFO L225 Difference]: With dead ends: 22 [2022-12-14 12:36:12,303 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 12:36:12,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:36:12,304 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:36:12,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 12:36:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 12:36:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 12:36:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-12-14 12:36:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-12-14 12:36:12,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-12-14 12:36:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:36:12,308 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-12-14 12:36:12,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:36:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-12-14 12:36:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:36:12,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:36:12,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:36:12,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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 [2022-12-14 12:36:12,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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 [2022-12-14 12:36:12,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:36:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:36:12,513 INFO L85 PathProgramCache]: Analyzing trace with hash 180198175, now seen corresponding path program 1 times [2022-12-14 12:36:12,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:36:12,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268544937] [2022-12-14 12:36:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:12,515 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 [2022-12-14 12:36:12,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:36:12,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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) [2022-12-14 12:36:12,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/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 [2022-12-14 12:36:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:36:12,859 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:36:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:36:13,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2022-12-14 12:36:13,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1389867077] [2022-12-14 12:36:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:36:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:36:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:36:13,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:36:13,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_072fa999-66c0-4810-a2b9-3e0a67e9d65a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 12:36:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:36:13,779 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:36:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat