./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61ffc5d3104f879fcd66a8ed550fe0d20a910c87b717c72a3dc729bb40cff29b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:35:25,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:35:25,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:35:25,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:35:25,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:35:25,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:35:25,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:35:25,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:35:25,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:35:25,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:35:25,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:35:25,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:35:25,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:35:25,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:35:25,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:35:25,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:35:25,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:35:25,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:35:25,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:35:25,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:35:25,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:35:25,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:35:25,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:35:25,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:35:25,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:35:25,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:35:25,870 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:35:25,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:35:25,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:35:25,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:35:25,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:35:25,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:35:25,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:35:25,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:35:25,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:35:25,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:35:25,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:35:25,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:35:25,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:35:25,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:35:25,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:35:25,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:35:25,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:35:25,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:35:25,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:35:25,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:35:25,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:35:25,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:35:25,928 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:35:25,928 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:35:25,928 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:35:25,929 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:35:25,930 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:35:25,930 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:35:25,930 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:35:25,930 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:35:25,931 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:35:25,931 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:35:25,931 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:35:25,931 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:35:25,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:35:25,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:35:25,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:35:25,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:35:25,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:35:25,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:35:25,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:35:25,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:35:25,936 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:35:25,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:35:25,936 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:35:25,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:35:25,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:35:25,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:35:25,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:35:25,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:35:25,938 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:35:25,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:35:25,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:35:25,939 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:35:25,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:35:25,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:35:25,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:35:25,939 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_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ffc5d3104f879fcd66a8ed550fe0d20a910c87b717c72a3dc729bb40cff29b [2022-11-19 07:35:26,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:35:26,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:35:26,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:35:26,284 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:35:26,286 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:35:26,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_1+newton_3_7.i [2022-11-19 07:35:26,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/data/50f3608de/1c1e3a750ca740e3a3a59133d4adde7b/FLAG936253caa [2022-11-19 07:35:26,837 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:35:26,838 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/sv-benchmarks/c/combinations/gcd_1+newton_3_7.i [2022-11-19 07:35:26,846 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/data/50f3608de/1c1e3a750ca740e3a3a59133d4adde7b/FLAG936253caa [2022-11-19 07:35:27,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/data/50f3608de/1c1e3a750ca740e3a3a59133d4adde7b [2022-11-19 07:35:27,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:35:27,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:35:27,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:35:27,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:35:27,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:35:27,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33716271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27, skipping insertion in model container [2022-11-19 07:35:27,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:35:27,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:35:27,500 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/sv-benchmarks/c/combinations/gcd_1+newton_3_7.i[1226,1239] [2022-11-19 07:35:27,525 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/sv-benchmarks/c/combinations/gcd_1+newton_3_7.i[2828,2841] [2022-11-19 07:35:27,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:35:27,535 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:35:27,551 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/sv-benchmarks/c/combinations/gcd_1+newton_3_7.i[1226,1239] [2022-11-19 07:35:27,562 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/sv-benchmarks/c/combinations/gcd_1+newton_3_7.i[2828,2841] [2022-11-19 07:35:27,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:35:27,578 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:35:27,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27 WrapperNode [2022-11-19 07:35:27,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:35:27,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:35:27,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:35:27,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:35:27,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,629 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2022-11-19 07:35:27,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:35:27,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:35:27,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:35:27,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:35:27,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:35:27,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:35:27,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:35:27,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:35:27,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (1/1) ... [2022-11-19 07:35:27,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:35:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:27,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:35:27,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:35:27,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:35:27,734 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 07:35:27,734 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 07:35:27,734 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 07:35:27,734 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 07:35:27,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:35:27,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:35:27,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:35:27,817 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:35:27,820 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:35:28,071 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:35:28,207 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:35:28,208 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:35:28,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:28 BoogieIcfgContainer [2022-11-19 07:35:28,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:35:28,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:35:28,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:35:28,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:35:28,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:27" (1/3) ... [2022-11-19 07:35:28,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22276436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:28, skipping insertion in model container [2022-11-19 07:35:28,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:27" (2/3) ... [2022-11-19 07:35:28,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22276436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:28, skipping insertion in model container [2022-11-19 07:35:28,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:28" (3/3) ... [2022-11-19 07:35:28,231 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_7.i [2022-11-19 07:35:28,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:35:28,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:35:28,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:35:28,339 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;@25231177, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:35:28,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:35:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:35:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:35:28,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:28,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:35:28,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash -391407110, now seen corresponding path program 1 times [2022-11-19 07:35:28,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:28,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074529312] [2022-11-19 07:35:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:28,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:28,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:28,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554509659] [2022-11-19 07:35:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:28,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:28,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:28,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:28,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:35:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:35:28,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:28,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:35:28,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:28,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074529312] [2022-11-19 07:35:28,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554509659] [2022-11-19 07:35:28,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554509659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:28,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:28,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:35:28,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754437113] [2022-11-19 07:35:28,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:28,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:28,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:28,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:28,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:28,814 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:28,903 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-11-19 07:35:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:35:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:28,914 INFO L225 Difference]: With dead ends: 37 [2022-11-19 07:35:28,914 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 07:35:28,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:28,925 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:28,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:35:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 07:35:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-19 07:35:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:35:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-19 07:35:28,961 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2022-11-19 07:35:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:28,962 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-19 07:35:28,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-19 07:35:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:35:28,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:28,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:28,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:35:29,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 07:35:29,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:29,170 INFO L85 PathProgramCache]: Analyzing trace with hash 749024068, now seen corresponding path program 1 times [2022-11-19 07:35:29,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:29,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700841341] [2022-11-19 07:35:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:29,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:29,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:29,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327360867] [2022-11-19 07:35:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:29,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:29,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:29,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:29,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:35:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:35:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:29,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:35:29,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700841341] [2022-11-19 07:35:29,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:29,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327360867] [2022-11-19 07:35:29,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327360867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:29,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276737597] [2022-11-19 07:35:29,392 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:35:29,392 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:29,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:29,401 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:29,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:29,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:30,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|) 1 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main1_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:30,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:30,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:30,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-19 07:35:30,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767576798] [2022-11-19 07:35:30,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:30,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:35:30,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:30,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:35:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:35:30,093 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:30,158 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-19 07:35:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:35:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:35:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:30,160 INFO L225 Difference]: With dead ends: 28 [2022-11-19 07:35:30,160 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 07:35:30,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:35:30,161 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:30,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:35:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 07:35:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 07:35:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:35:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-19 07:35:30,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2022-11-19 07:35:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:30,169 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-19 07:35:30,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-19 07:35:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:35:30,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:30,170 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:30,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:30,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:30,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:30,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1742652218, now seen corresponding path program 2 times [2022-11-19 07:35:30,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:30,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093920037] [2022-11-19 07:35:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:30,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:30,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:30,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541172699] [2022-11-19 07:35:30,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:30,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:30,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:30,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:35:43,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:35:43,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 07:35:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:21,037 WARN L233 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 47 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:35,834 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))))) is different from false [2022-11-19 07:37:06,738 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) is different from false [2022-11-19 07:37:25,327 WARN L837 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) is different from false [2022-11-19 07:37:27,330 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~y~0#1| Int) (|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse0 (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |ULTIMATE.start_main1_~y~0#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |ULTIMATE.start_main1_~y~0#1|) 0) (< 0 |ULTIMATE.start_main1_~y~0#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod (mod |ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0) (not (= .cse0 0))))) is different from true [2022-11-19 07:37:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-19 07:37:27,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:43,230 WARN L233 SmtUtils]: Spent 3.06m on a formula simplification that was a NOOP. DAG size: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:43:33,315 WARN L233 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 45 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:44:22,941 WARN L859 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_12| Int) (|v_ULTIMATE.start_main1_~x~0#1_7| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_7|) 256) |v_ULTIMATE.start_main1_~y~0#1_12|) 256))) (or (not (= 0 (mod (mod |v_ULTIMATE.start_main1_~y~0#1_12| .cse0) 256))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_7|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_7|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_12| 0) (not (= (mod |v_ULTIMATE.start_main1_~x~0#1_7| |v_ULTIMATE.start_main1_~y~0#1_12|) 0)) (= .cse0 0)))) is different from true [2022-11-19 07:44:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:44:22,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:22,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093920037] [2022-11-19 07:44:22,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:44:22,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541172699] [2022-11-19 07:44:22,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541172699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:22,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126097954] [2022-11-19 07:44:22,945 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:44:22,945 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:22,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:22,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:22,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:23,377 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:50,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '318#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~y~0#1|) 1 0)) (<= 0 (+ |ULTIMATE.start_gcd_test_#res#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (<= |ULTIMATE.start_main1_~x~0#1| 127) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (<= 0 |ULTIMATE.start_main1_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_gcd_test_#in~b#1|) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= 0 (+ |ULTIMATE.start_main1_~x~0#1| 128)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:50,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:50,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:44:50,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-19 07:44:50,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733280420] [2022-11-19 07:44:50,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:50,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:44:50,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:44:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=154, Unknown=23, NotChecked=116, Total=342 [2022-11-19 07:44:50,798 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:44:53,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:45:50,564 WARN L233 SmtUtils]: Spent 42.93s on a formula simplification. DAG size of input: 46 DAG size of output: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:45:52,609 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (< 0 |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) .cse0 (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse3 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse2 (<= .cse3 127))) (and (let ((.cse1 (mod (+ .cse3 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse1 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse2 (= .cse1 0))) (let ((.cse4 (mod (mod .cse3 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse2) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse4) 256) 0)) (= .cse4 0)))))) (not .cse0) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0))) (or (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse5 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (<= .cse5 127)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse5)))) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse6 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse6 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse6))))) (or (let ((.cse39 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse40 (mod (+ .cse39 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse41 (mod (+ .cse39 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse25 (mod .cse39 256)) (.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse16 (<= .cse41 127)) (.cse7 (<= .cse40 127)) (.cse32 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse40) 256) 0))) (.cse34 (= .cse40 0)) (.cse35 (= |c_ULTIMATE.start_main1_~y~0#1| .cse40)) (.cse36 (= .cse41 0)) (.cse37 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse41) 256) 0))) (.cse20 (not .cse26)) (.cse38 (= |c_ULTIMATE.start_main1_~y~0#1| .cse41)) (.cse27 (+ |c_ULTIMATE.start_main1_~y~0#1| 256))) (let ((.cse18 (= .cse41 .cse27)) (.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse41)) 256) 0))) (.cse13 (or .cse36 .cse37 .cse20 .cse38)) (.cse24 (or .cse32 .cse20 .cse34 .cse35)) (.cse10 (not .cse7)) (.cse15 (not .cse16)) (.cse21 (not .cse12)) (.cse22 (= .cse40 .cse27)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse40)) 256) 0))) (.cse28 (<= .cse25 127))) (and (or (let ((.cse14 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse25)) 256) 0)) .cse26 (= .cse25 .cse27)))) (let ((.cse11 (or .cse21 (and .cse24 .cse14))) (.cse8 (or .cse21 (and .cse14 (or .cse22 .cse23 .cse20))))) (and (or (let ((.cse9 (or .cse12 (and .cse13 .cse14)))) (and (or .cse7 (and .cse8 .cse9)) (or .cse10 (and .cse11 .cse9)))) .cse15) (or .cse16 (let ((.cse17 (or (and .cse14 (or .cse18 .cse19 .cse20)) .cse12))) (and (or .cse10 (and .cse17 .cse11)) (or .cse7 (and .cse17 .cse8)))))))) .cse28) (or (let ((.cse31 (or .cse26 (= |c_ULTIMATE.start_main1_~y~0#1| .cse25) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse25) 256) 0)) (= .cse25 0))) (.cse33 (= .cse39 0))) (let ((.cse29 (or .cse21 (and .cse31 (or .cse33 .cse22 .cse23 .cse20))))) (and (or .cse16 (let ((.cse30 (or (and .cse31 (or .cse33 .cse18 .cse19 .cse20)) .cse12))) (and (or (and .cse29 .cse30) .cse7) (or (and (or .cse21 (and .cse31 (or .cse32 .cse33 .cse20 .cse34 .cse35))) .cse30) .cse10)))) (or (and (or (and (or (and .cse13 .cse31) .cse12) (or .cse21 (and .cse31 .cse24))) .cse10) (or .cse7 (and (or (and .cse31 (or .cse33 .cse36 .cse37 .cse20 .cse38)) .cse12) .cse29))) .cse15)))) (not .cse28))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)))) is different from false [2022-11-19 07:45:54,614 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (< 0 |c_ULTIMATE.start_main1_~y~0#1|))) (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) .cse0 (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse3 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse2 (<= .cse3 127))) (and (let ((.cse1 (mod (+ .cse3 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse1 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse2 (= .cse1 0))) (let ((.cse4 (mod (mod .cse3 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse2) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse4) 256) 0)) (= .cse4 0)))))) (not .cse0) (not (< |c_ULTIMATE.start_main1_~x~0#1| 0))) (or (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse5 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (not (<= .cse5 127)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse5)))) (and (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (let ((.cse6 (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256))) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (<= .cse6 127) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse6))))) (or (let ((.cse39 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse40 (mod (+ .cse39 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse41 (mod (+ .cse39 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse25 (mod .cse39 256)) (.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse16 (<= .cse41 127)) (.cse7 (<= .cse40 127)) (.cse32 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse40) 256) 0))) (.cse34 (= .cse40 0)) (.cse35 (= |c_ULTIMATE.start_main1_~y~0#1| .cse40)) (.cse36 (= .cse41 0)) (.cse37 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse41) 256) 0))) (.cse20 (not .cse26)) (.cse38 (= |c_ULTIMATE.start_main1_~y~0#1| .cse41)) (.cse27 (+ |c_ULTIMATE.start_main1_~y~0#1| 256))) (let ((.cse18 (= .cse41 .cse27)) (.cse19 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse41)) 256) 0))) (.cse13 (or .cse36 .cse37 .cse20 .cse38)) (.cse24 (or .cse32 .cse20 .cse34 .cse35)) (.cse10 (not .cse7)) (.cse15 (not .cse16)) (.cse21 (not .cse12)) (.cse22 (= .cse40 .cse27)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse40)) 256) 0))) (.cse28 (<= .cse25 127))) (and (or (let ((.cse14 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse25)) 256) 0)) .cse26 (= .cse25 .cse27)))) (let ((.cse11 (or .cse21 (and .cse24 .cse14))) (.cse8 (or .cse21 (and .cse14 (or .cse22 .cse23 .cse20))))) (and (or (let ((.cse9 (or .cse12 (and .cse13 .cse14)))) (and (or .cse7 (and .cse8 .cse9)) (or .cse10 (and .cse11 .cse9)))) .cse15) (or .cse16 (let ((.cse17 (or (and .cse14 (or .cse18 .cse19 .cse20)) .cse12))) (and (or .cse10 (and .cse17 .cse11)) (or .cse7 (and .cse17 .cse8)))))))) .cse28) (or (let ((.cse31 (or .cse26 (= |c_ULTIMATE.start_main1_~y~0#1| .cse25) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse25) 256) 0)) (= .cse25 0))) (.cse33 (= .cse39 0))) (let ((.cse29 (or .cse21 (and .cse31 (or .cse33 .cse22 .cse23 .cse20))))) (and (or .cse16 (let ((.cse30 (or (and .cse31 (or .cse33 .cse18 .cse19 .cse20)) .cse12))) (and (or (and .cse29 .cse30) .cse7) (or (and (or .cse21 (and .cse31 (or .cse32 .cse33 .cse20 .cse34 .cse35))) .cse30) .cse10)))) (or (and (or (and (or (and .cse13 .cse31) .cse12) (or .cse21 (and .cse31 .cse24))) .cse10) (or .cse7 (and (or (and .cse31 (or .cse33 .cse36 .cse37 .cse20 .cse38)) .cse12) .cse29))) .cse15)))) (not .cse28))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)))) is different from true [2022-11-19 07:46:28,706 WARN L233 SmtUtils]: Spent 29.85s on a formula simplification. DAG size of input: 48 DAG size of output: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:46:29,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:46:31,986 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 |c_ULTIMATE.start_main1_~y~0#1|) (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|ULTIMATE.start_gcd_test_#in~a#1| Int)) (and (< |ULTIMATE.start_gcd_test_#in~a#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (mod |ULTIMATE.start_gcd_test_#in~a#1| |c_ULTIMATE.start_main1_~y~0#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |ULTIMATE.start_gcd_test_#in~a#1|) 256) |c_ULTIMATE.start_main1_~y~0#1|) 256))))) is different from false [2022-11-19 07:46:34,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:46:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:34,083 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-19 07:46:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:46:34,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:46:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:34,085 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:46:34,085 INFO L226 Difference]: Without dead ends: 26 [2022-11-19 07:46:34,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 433.1s TimeCoverageRelationStatistics Valid=62, Invalid=201, Unknown=33, NotChecked=210, Total=506 [2022-11-19 07:46:34,086 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:34,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 189 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 2 Unknown, 72 Unchecked, 5.7s Time] [2022-11-19 07:46:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-19 07:46:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-19 07:46:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:46:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-19 07:46:34,102 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2022-11-19 07:46:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:34,104 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-19 07:46:34,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-19 07:46:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:46:34,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:34,108 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:34,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 07:46:34,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:34,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1814613500, now seen corresponding path program 3 times [2022-11-19 07:46:34,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:34,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584787858] [2022-11-19 07:46:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:34,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:34,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:46:34,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378761341] [2022-11-19 07:46:34,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:46:34,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:34,334 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:34,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ccde4f9-517a-4e1a-bd93-a0ce550bbb42/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:46:42,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:46:42,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:46:42,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:46:42,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:04,382 INFO L328 TraceCheckSpWp]: Computing backward predicates...