./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8060cb1ce07e11abaa182acb01dfa4175ca7fb1d00421c40b0d3868d7fbf682f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:28:19,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:28:19,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:28:19,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:28:19,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:28:19,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:28:19,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:28:19,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:28:19,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:28:19,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:28:19,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:28:19,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:28:19,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:28:19,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:28:20,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:28:20,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:28:20,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:28:20,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:28:20,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:28:20,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:28:20,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:28:20,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:28:20,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:28:20,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:28:20,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:28:20,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:28:20,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:28:20,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:28:20,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:28:20,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:28:20,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:28:20,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:28:20,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:28:20,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:28:20,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:28:20,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:28:20,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:28:20,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:28:20,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:28:20,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:28:20,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:28:20,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:28:20,044 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:28:20,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:28:20,045 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:28:20,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:28:20,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:28:20,045 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:28:20,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:28:20,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:28:20,046 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:28:20,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:28:20,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:28:20,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:28:20,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:28:20,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:28:20,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:28:20,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:28:20,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:28:20,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:28:20,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:28:20,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:28:20,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:28:20,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:28:20,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:28:20,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:28:20,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:28:20,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:28:20,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:28:20,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:28:20,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:28:20,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:28:20,049 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:28:20,049 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:28:20,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:28:20,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:28:20,050 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_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8060cb1ce07e11abaa182acb01dfa4175ca7fb1d00421c40b0d3868d7fbf682f [2021-12-07 00:28:20,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:28:20,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:28:20,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:28:20,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:28:20,261 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:28:20,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_1+newton_2_6.i [2021-12-07 00:28:20,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/data/41ac78c25/f22eb9bd5572422eb76f586e28a9fe81/FLAGe0bf24876 [2021-12-07 00:28:20,663 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:28:20,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i [2021-12-07 00:28:20,669 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/data/41ac78c25/f22eb9bd5572422eb76f586e28a9fe81/FLAGe0bf24876 [2021-12-07 00:28:20,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/data/41ac78c25/f22eb9bd5572422eb76f586e28a9fe81 [2021-12-07 00:28:20,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:28:20,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:28:20,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:28:20,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:28:20,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:28:20,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fcfdd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20, skipping insertion in model container [2021-12-07 00:28:20,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:28:20,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:28:20,816 WARN L230 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_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i[1226,1239] [2021-12-07 00:28:20,834 WARN L230 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_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i[2807,2820] [2021-12-07 00:28:20,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:28:20,841 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:28:20,851 WARN L230 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_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i[1226,1239] [2021-12-07 00:28:20,860 WARN L230 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_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/sv-benchmarks/c/combinations/gcd_1+newton_2_6.i[2807,2820] [2021-12-07 00:28:20,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:28:20,872 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:28:20,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20 WrapperNode [2021-12-07 00:28:20,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:28:20,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:28:20,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:28:20,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:28:20,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,901 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-07 00:28:20,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:28:20,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:28:20,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:28:20,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:28:20,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:28:20,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:28:20,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:28:20,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:28:20,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (1/1) ... [2021-12-07 00:28:20,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:28:20,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:20,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:28:20,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:28:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:28:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-07 00:28:20,973 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-07 00:28:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-07 00:28:20,973 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-07 00:28:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:28:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:28:20,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:28:21,030 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:28:21,032 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:28:21,154 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:28:21,161 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:28:21,161 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-07 00:28:21,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:28:21 BoogieIcfgContainer [2021-12-07 00:28:21,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:28:21,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:28:21,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:28:21,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:28:21,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:28:20" (1/3) ... [2021-12-07 00:28:21,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5639e884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:28:21, skipping insertion in model container [2021-12-07 00:28:21,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:28:20" (2/3) ... [2021-12-07 00:28:21,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5639e884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:28:21, skipping insertion in model container [2021-12-07 00:28:21,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:28:21" (3/3) ... [2021-12-07 00:28:21,171 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_2_6.i [2021-12-07 00:28:21,176 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:28:21,177 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-07 00:28:21,222 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:28:21,228 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:28:21,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-07 00:28:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:28:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:28:21,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:21,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:21,251 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:21,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2021-12-07 00:28:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136527292] [2021-12-07 00:28:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:21,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:21,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:21,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166255336] [2021-12-07 00:28:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:21,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:21,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:21,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:28:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 00:28:21,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:28:21,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:28:21,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:21,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136527292] [2021-12-07 00:28:21,433 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:28:21,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166255336] [2021-12-07 00:28:21,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166255336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:28:21,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:28:21,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:28:21,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829094459] [2021-12-07 00:28:21,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:28:21,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:28:21,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:21,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:28:21,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:28:21,461 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-07 00:28:21,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:21,477 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-12-07 00:28:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:28:21,478 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 11 [2021-12-07 00:28:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:21,484 INFO L225 Difference]: With dead ends: 66 [2021-12-07 00:28:21,484 INFO L226 Difference]: Without dead ends: 29 [2021-12-07 00:28:21,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:28:21,489 INFO L933 BasicCegarLoop]: 43 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, 43 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 [2021-12-07 00:28:21,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:28:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-07 00:28:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-07 00:28:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:28:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-07 00:28:21,518 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2021-12-07 00:28:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:21,518 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-07 00:28:21,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-12-07 00:28:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-07 00:28:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-07 00:28:21,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:21,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:21,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:28:21,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-07 00:28:21,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2021-12-07 00:28:21,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:21,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003758989] [2021-12-07 00:28:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:21,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:21,730 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:21,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202981892] [2021-12-07 00:28:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:21,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:21,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:21,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:21,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:28:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:21,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:28:21,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:28:21,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:28:21,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003758989] [2021-12-07 00:28:21,806 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:28:21,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202981892] [2021-12-07 00:28:21,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202981892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:28:21,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:28:21,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:28:21,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335744876] [2021-12-07 00:28:21,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:28:21,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:28:21,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:21,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:28:21,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:28:21,808 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-07 00:28:21,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:21,820 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-12-07 00:28:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:28:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11 [2021-12-07 00:28:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:21,822 INFO L225 Difference]: With dead ends: 36 [2021-12-07 00:28:21,822 INFO L226 Difference]: Without dead ends: 30 [2021-12-07 00:28:21,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:28:21,824 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:21,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:28:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-07 00:28:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-07 00:28:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:28:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-07 00:28:21,831 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-07 00:28:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:21,832 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-07 00:28:21,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-12-07 00:28:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-07 00:28:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:28:21,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:21,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:21,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:28:22,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:22,035 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2021-12-07 00:28:22,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:22,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840165144] [2021-12-07 00:28:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:22,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:22,090 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:22,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796420212] [2021-12-07 00:28:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:22,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:22,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:22,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:22,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:28:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 00:28:22,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:28:22,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:28:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:28:22,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840165144] [2021-12-07 00:28:22,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:28:22,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796420212] [2021-12-07 00:28:22,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796420212] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:28:22,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:28:22,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-07 00:28:22,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682851779] [2021-12-07 00:28:22,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:28:22,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:28:22,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:28:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:28:22,288 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-07 00:28:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:22,329 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-07 00:28:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:28:22,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2021-12-07 00:28:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:22,330 INFO L225 Difference]: With dead ends: 36 [2021-12-07 00:28:22,330 INFO L226 Difference]: Without dead ends: 31 [2021-12-07 00:28:22,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:28:22,331 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:22,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 128 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:28:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-07 00:28:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-07 00:28:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:28:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-07 00:28:22,336 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-07 00:28:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:22,337 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-07 00:28:22,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-07 00:28:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-07 00:28:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:28:22,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:22,338 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:22,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:28:22,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:22,540 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:22,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2021-12-07 00:28:22,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:22,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186254822] [2021-12-07 00:28:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:22,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:22,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:28:22,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719369923] [2021-12-07 00:28:22,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:28:22,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:22,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:22,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:22,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:28:28,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:28:28,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:28:28,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-07 00:28:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:31:38,962 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-12-07 00:32:20,281 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-12-07 00:33:15,547 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-12-07 00:34:00,291 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-12-07 00:34:02,296 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true [2021-12-07 00:34:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-07 00:34:43,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:37:40,552 WARN L227 SmtUtils]: Spent 2.39m on a formula simplification. DAG size of input: 114 DAG size of output: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:38:14,417 WARN L227 SmtUtils]: Spent 23.09s on a formula simplification. DAG size of input: 65 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:38:39,310 WARN L227 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 44 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:39:01,845 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse1 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (= .cse0 0) (< 127 .cse1) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0)))) (let ((.cse2 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_main1_~y~0#1|))) (or (<= .cse1 127) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main1_~y~0#1| 255) .cse2) 256) (- 256))) 256) 0)) (= .cse2 0))))) (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 0)) is different from true [2021-12-07 00:40:24,025 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256))) (let ((.cse1 (mod (mod .cse0 |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (< 127 .cse0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse1) 256) 0)) (= .cse1 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0))))) is different from false [2021-12-07 00:40:26,028 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256))) (let ((.cse1 (mod (mod .cse0 |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (< 127 .cse0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse1) 256) 0)) (= .cse1 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0))))) is different from true [2021-12-07 00:41:02,703 WARN L227 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 7 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-07 00:41:19,529 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from false [2021-12-07 00:41:21,534 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from true [2021-12-07 00:41:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:41:21,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:41:21,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186254822] [2021-12-07 00:41:21,535 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:41:21,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719369923] [2021-12-07 00:41:21,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719369923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:41:21,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:41:21,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2021-12-07 00:41:21,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163479443] [2021-12-07 00:41:21,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:41:21,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 00:41:21,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:41:21,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 00:41:21,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=119, Unknown=20, NotChecked=196, Total=380 [2021-12-07 00:41:21,537 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-12-07 00:42:17,698 WARN L227 SmtUtils]: Spent 44.07s on a formula simplification. DAG size of input: 44 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:42:19,741 WARN L838 $PredicateComparison]: unable to prove that (and (or (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|) (let ((.cse1 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (= .cse0 0) (< 127 .cse1) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse0) 256) 0)))) (or (<= .cse1 127) (let ((.cse3 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse2 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse3) 256))) (and (or (< 127 .cse2) (= .cse2 0)) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse2)) 256) 0)) (<= .cse2 127) (= .cse3 0)))))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2021-12-07 00:42:22,029 WARN L838 $PredicateComparison]: unable to prove that (and (or (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse8 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse12 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse8) 256))) (let ((.cse3 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse12)) 256) 0))) (.cse0 (<= .cse12 127)) (.cse5 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse12) 256) 0))) (.cse2 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse6 (= .cse12 0)) (.cse7 (< 127 .cse12)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse10 (mod .cse8 256))) (and (or (let ((.cse1 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse10) 256) 0)) (= 0 .cse10))) (.cse4 (= .cse8 0))) (and (or .cse0 (and .cse1 (or .cse2 .cse3 .cse4))) (or (and .cse1 (or .cse5 .cse2 .cse6 .cse4)) .cse7))) (< 127 .cse10)) (or (<= .cse10 127) (let ((.cse11 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse10)) 256) 0))))) (and (or (and (or .cse2 .cse3) .cse11) .cse0) (or (and .cse11 (or .cse5 .cse2 .cse6)) .cse7))))))))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (let ((.cse13 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| .cse13) (<= .cse13 127)) (and (< 127 .cse13) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse13)))) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|)) is different from false [2021-12-07 00:42:24,080 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse20 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse28 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse20) 256))) (let ((.cse11 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse15 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse16 (= .cse28 0)) (.cse29 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse20) 256))) (let ((.cse17 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse18 (<= .cse29 127)) (.cse8 (< 127 .cse28)) (.cse2 (<= .cse28 127)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse10 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse12 (= .cse29 0)) (.cse1 (< 127 .cse29)) (.cse19 (not (= 0 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256)))) (.cse7 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (or .cse11 .cse15 .cse16)) (.cse21 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse22 (mod .cse20 256))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (and (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256))) (or (and (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (<= .cse0 127)) (and (< 127 .cse0) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse0)))) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (or (let ((.cse5 (or .cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256) 0)) (= 0 .cse22))) (.cse13 (= .cse20 0))) (let ((.cse3 (or .cse7 (and .cse5 (or .cse11 .cse19 .cse13))))) (and (or .cse1 (let ((.cse4 (or .cse9 (and .cse5 (or .cse10 .cse11 .cse12 .cse13))))) (and (or .cse2 (and .cse3 .cse4)) (or (and .cse4 (or (and .cse5 .cse6) .cse7)) .cse8)))) (or (let ((.cse14 (or .cse9 (and .cse5 (or .cse11 .cse17 .cse13))))) (and (or (and .cse14 (or .cse7 (and (or .cse11 .cse15 .cse16 .cse13) .cse5))) .cse8) (or .cse2 (and .cse3 .cse14)))) .cse18)))) (< 127 .cse22)) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (<= .cse22 127) (let ((.cse26 (or .cse21 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse22)) 256) 0))))) (let ((.cse24 (or .cse7 (and .cse26 .cse6))) (.cse25 (or .cse7 (and .cse26 (or .cse11 .cse19))))) (and (or (let ((.cse23 (or (and (or .cse11 .cse17) .cse26) .cse9))) (and (or (and .cse23 .cse24) .cse8) (or .cse2 (and .cse23 .cse25)))) .cse18) (or (let ((.cse27 (or .cse9 (and .cse26 (or .cse10 .cse11 .cse12))))) (and (or (and .cse27 .cse24) .cse8) (or .cse2 (and .cse27 .cse25)))) .cse1)))))))))) is different from false [2021-12-07 00:43:08,648 WARN L227 SmtUtils]: Spent 32.36s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:43:10,652 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (or (< 127 |c_ULTIMATE.start_gcd_test_~a#1|) (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< (+ |c_ULTIMATE.start_gcd_test_~a#1| 128) 0))) is different from false [2021-12-07 00:43:12,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:43:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:12,883 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-12-07 00:43:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:43:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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 13 [2021-12-07 00:43:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:12,885 INFO L225 Difference]: With dead ends: 40 [2021-12-07 00:43:12,885 INFO L226 Difference]: Without dead ends: 35 [2021-12-07 00:43:12,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 340.4s TimeCoverageRelationStatistics Valid=61, Invalid=165, Unknown=28, NotChecked=396, Total=650 [2021-12-07 00:43:12,886 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:12,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 285 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 1 Unknown, 114 Unchecked, 2.3s Time] [2021-12-07 00:43:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-07 00:43:12,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-12-07 00:43:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 00:43:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-07 00:43:12,892 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 13 [2021-12-07 00:43:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:12,892 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-07 00:43:12,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2021-12-07 00:43:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-07 00:43:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:43:12,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:12,894 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:12,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:43:13,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-07 00:43:13,095 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:13,097 INFO L85 PathProgramCache]: Analyzing trace with hash 403427572, now seen corresponding path program 1 times [2021-12-07 00:43:13,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:13,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467172089] [2021-12-07 00:43:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:13,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:13,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:13,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470221406] [2021-12-07 00:43:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:13,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:13,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:13,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:13,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d727c78-15d7-4cd4-aa0d-2f861f3e4840/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:43:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:13,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:43:13,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:13,547 INFO L328 TraceCheckSpWp]: Computing backward predicates...