./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_3_7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_3_7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc --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 803cbc2ab2fb54f2ccf794a1cf55b1df2243f22f996d0e59d0f49967facf7958 --- 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-5e519f3 [2022-11-02 21:00:46,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:00:46,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:00:46,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:00:46,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:00:46,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:00:46,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:00:46,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:00:46,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:00:46,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:00:46,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:00:46,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:00:46,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:00:46,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:00:46,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:00:46,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:00:46,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:00:46,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:00:46,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:00:46,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:00:46,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:00:46,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:00:46,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:00:46,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:00:46,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:00:46,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:00:46,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:00:46,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:00:46,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:00:46,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:00:46,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:00:46,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:00:46,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:00:46,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:00:46,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:00:46,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:00:46,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:00:46,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:00:46,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:00:46,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:00:46,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:00:46,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:00:46,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:00:46,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:00:46,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:00:46,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:00:46,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:00:46,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:00:46,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:00:46,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:00:46,305 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:00:46,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:00:46,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:00:46,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:00:46,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:00:46,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:00:46,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:00:46,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:00:46,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:00:46,308 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:00:46,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:00:46,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:00:46,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:00:46,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:00:46,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:00:46,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:00:46,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:00:46,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:00:46,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:00:46,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:00:46,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:00:46,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:00:46,311 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:00:46,311 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:00:46,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:00:46,312 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_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 803cbc2ab2fb54f2ccf794a1cf55b1df2243f22f996d0e59d0f49967facf7958 [2022-11-02 21:00:46,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:00:46,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:00:46,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:00:46,649 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:00:46,650 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:00:46,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/combinations/gcd_2+newton_3_7.i [2022-11-02 21:00:46,744 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/data/c9966dbc9/78234b83ba30451d93dfad18b99f42f0/FLAG221729c23 [2022-11-02 21:00:47,226 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:00:47,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/sv-benchmarks/c/combinations/gcd_2+newton_3_7.i [2022-11-02 21:00:47,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/data/c9966dbc9/78234b83ba30451d93dfad18b99f42f0/FLAG221729c23 [2022-11-02 21:00:47,603 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/data/c9966dbc9/78234b83ba30451d93dfad18b99f42f0 [2022-11-02 21:00:47,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:00:47,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:00:47,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:00:47,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:00:47,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:00:47,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:47,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43634bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47, skipping insertion in model container [2022-11-02 21:00:47,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:47,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:00:47,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:00:47,871 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_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/sv-benchmarks/c/combinations/gcd_2+newton_3_7.i[1226,1239] [2022-11-02 21:00:47,898 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_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/sv-benchmarks/c/combinations/gcd_2+newton_3_7.i[2862,2875] [2022-11-02 21:00:47,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:00:47,909 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:00:47,928 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_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/sv-benchmarks/c/combinations/gcd_2+newton_3_7.i[1226,1239] [2022-11-02 21:00:47,947 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_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/sv-benchmarks/c/combinations/gcd_2+newton_3_7.i[2862,2875] [2022-11-02 21:00:47,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:00:47,968 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:00:47,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47 WrapperNode [2022-11-02 21:00:47,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:00:47,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:00:47,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:00:47,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:00:47,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:47,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,011 INFO L138 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2022-11-02 21:00:48,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:00:48,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:00:48,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:00:48,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:00:48,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,044 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:00:48,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:00:48,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:00:48,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:00:48,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (1/1) ... [2022-11-02 21:00:48,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:00:48,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:48,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:00:48,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:00:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:00:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-02 21:00:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-02 21:00:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-02 21:00:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-02 21:00:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:00:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:00:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:00:48,204 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:00:48,205 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:00:48,471 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:00:48,477 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:00:48,491 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:00:48,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:48 BoogieIcfgContainer [2022-11-02 21:00:48,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:00:48,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:00:48,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:00:48,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:00:48,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:00:47" (1/3) ... [2022-11-02 21:00:48,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b9efa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:00:48, skipping insertion in model container [2022-11-02 21:00:48,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:00:47" (2/3) ... [2022-11-02 21:00:48,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b9efa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:00:48, skipping insertion in model container [2022-11-02 21:00:48,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:00:48" (3/3) ... [2022-11-02 21:00:48,502 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_3_7.i [2022-11-02 21:00:48,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:00:48,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 21:00:48,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:00:48,608 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36bbf11d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:00:48,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 21:00:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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) [2022-11-02 21:00:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:00:48,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:48,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:48,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:48,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-11-02 21:00:48,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114715642] [2022-11-02 21:00:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:48,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:49,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:49,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114715642] [2022-11-02 21:00:49,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114715642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:49,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:49,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:00:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740784482] [2022-11-02 21:00:49,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:49,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:00:49,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:00:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:00:49,062 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 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 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-02 21:00:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:49,137 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-11-02 21:00:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:00:49,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-02 21:00:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:49,146 INFO L225 Difference]: With dead ends: 96 [2022-11-02 21:00:49,182 INFO L226 Difference]: Without dead ends: 39 [2022-11-02 21:00:49,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:49,206 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 29 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:49,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 122 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:00:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-02 21:00:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-11-02 21:00:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2022-11-02 21:00:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-11-02 21:00:49,256 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2022-11-02 21:00:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:49,257 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-11-02 21:00:49,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-02 21:00:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-11-02 21:00:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:00:49,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:49,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:49,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:00:49,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:49,261 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-11-02 21:00:49,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:49,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74149189] [2022-11-02 21:00:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:49,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:49,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:49,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74149189] [2022-11-02 21:00:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74149189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:00:49,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:00:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:00:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096651063] [2022-11-02 21:00:49,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:00:49,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:00:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:00:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:00:49,334 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-02 21:00:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:49,361 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-02 21:00:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:00:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2022-11-02 21:00:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:49,363 INFO L225 Difference]: With dead ends: 39 [2022-11-02 21:00:49,363 INFO L226 Difference]: Without dead ends: 33 [2022-11-02 21:00:49,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:00:49,365 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:49,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 97 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:00:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-02 21:00:49,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-02 21:00:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 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) [2022-11-02 21:00:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-02 21:00:49,373 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-11-02 21:00:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:49,374 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-02 21:00:49,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-02 21:00:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-02 21:00:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 21:00:49,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:49,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:49,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:00:49,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:49,376 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2022-11-02 21:00:49,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:49,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668508227] [2022-11-02 21:00:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:49,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:49,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:00:49,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536332829] [2022-11-02 21:00:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:49,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:49,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:00:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:00:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 21:00:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:49,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:00:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:00:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:00:49,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668508227] [2022-11-02 21:00:49,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:00:49,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536332829] [2022-11-02 21:00:49,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536332829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:00:49,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:00:49,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-11-02 21:00:49,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146350850] [2022-11-02 21:00:49,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:00:49,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:00:49,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:00:49,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:00:49,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:00:49,736 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-02 21:00:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:00:49,834 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-02 21:00:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:00:49,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 [2022-11-02 21:00:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:00:49,836 INFO L225 Difference]: With dead ends: 40 [2022-11-02 21:00:49,836 INFO L226 Difference]: Without dead ends: 34 [2022-11-02 21:00:49,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:00:49,838 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:00:49,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 183 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:00:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-02 21:00:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-02 21:00:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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) [2022-11-02 21:00:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-02 21:00:49,848 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-11-02 21:00:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:00:49,848 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-02 21:00:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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) [2022-11-02 21:00:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-02 21:00:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 21:00:49,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:00:49,852 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:00:49,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:00:50,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:50,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:00:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:00:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2022-11-02 21:00:50,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:00:50,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354921431] [2022-11-02 21:00:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:00:50,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:00:50,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:00:50,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954016856] [2022-11-02 21:00:50,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:00:50,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:00:50,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:00:50,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:00:50,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:00:50,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:00:50,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:00:50,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:00:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:00:58,347 WARN L234 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:01:09,189 WARN L234 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:01:17,826 WARN L234 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:01:29,036 WARN L234 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:01:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:01:29,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:01:42,781 WARN L855 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (let ((.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse5 (+ |c_ULTIMATE.start_main1_~y~0#1| 1)) (.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255))) (let ((.cse1 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse33 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse32 (mod .cse33 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse32) 256) 0)) (< .cse32 .cse5) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (<= (mod (+ .cse33 .cse3) 256) 127) (not (<= .cse32 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= (mod (+ .cse33 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)))))) (.cse6 (not .cse0)) (.cse9 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse30 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse31 (mod .cse30 256))) (or (not (<= (mod (+ .cse30 .cse3) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse31) 256) 0)) (< .cse31 .cse5) (not (<= (mod (+ .cse30 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (not (<= .cse31 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0))))))))) (and (or .cse0 .cse1) (or (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse2 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse4 (mod .cse2 256))) (or (not (<= (mod (+ .cse2 .cse3) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse4) 256) 0)) (< .cse4 .cse5) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= .cse4 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= (mod (+ .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127))))) .cse6) (or .cse0 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse8 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse7 (mod (+ .cse8 .cse3) 256))) (or (not (<= .cse7 127)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (<= (mod .cse8 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse7) 256) 0)) (< .cse7 .cse5) (<= (mod (+ .cse8 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)))))) (or (and .cse9 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse11 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse10 (mod (+ .cse11 .cse3) 256))) (or (not (<= .cse10 127)) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (<= (mod (+ .cse11 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse10) 256) 0)) (not (<= (mod .cse11 256) 127)) (< .cse10 .cse5)))))))) .cse0) (or .cse6 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse12 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse13 (mod (+ .cse12 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (not (<= (mod (+ .cse12 .cse3) 256) 127)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (< .cse13 .cse5) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (<= .cse13 127)) (<= (mod .cse12 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse13) 256) 0))))))) (or (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse15 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse14 (mod (+ .cse15 .cse3) 256))) (or (not (<= .cse14 127)) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (<= (mod (+ .cse15 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (<= (mod .cse15 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse14) 256) 0)) (< .cse14 .cse5))))) .cse0) (or .cse6 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse17 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse16 (mod (+ .cse17 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (< .cse16 .cse5) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (<= .cse16 127)) (<= (mod (+ .cse17 .cse3) 256) 127) (<= (mod .cse17 256) 127) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse16) 256) 0))))))) (or .cse6 .cse1) (or .cse0 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int) (|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse19 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (mod .cse19 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse18) 256) 0)) (< .cse18 .cse5) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (not (<= (mod (+ .cse19 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (<= (mod (+ .cse19 .cse3) 256) 127) (not (<= .cse18 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0)))))) (or .cse0 (and (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse20 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse21 (mod .cse20 256))) (or (not (<= (mod (+ .cse20 .cse3) 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse21) 256) 0)) (< .cse21 .cse5) (not (<= .cse21 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0) (<= (mod (+ .cse20 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127))))) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|))) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse23 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse22 (mod (+ .cse23 .cse3) 256))) (or (not (<= .cse22 127)) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse22) 256) 0)) (not (<= (mod .cse23 256) 127)) (< .cse22 .cse5) (<= (mod (+ .cse23 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127) (= .cse23 0))))) (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|))))) (or .cse6 (and (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse25 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod .cse25 256))) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse24) 256) 0)) (< .cse24 .cse5) (not (<= (mod (+ .cse25 |c_ULTIMATE.start_gcd_test_~b#1|) 256) 127)) (<= (mod (+ .cse25 .cse3) 256) 127) (not (<= .cse24 127)) (< |ULTIMATE.start_gcd_test_~a#1| 0))))))) (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse27 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse26 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (< .cse26 .cse5) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (<= .cse26 127)) (<= (mod (+ .cse27 .cse3) 256) 127) (not (<= (mod .cse27 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse26) 256) 0)) (= .cse27 0))))))))) (or .cse6 (and .cse9 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_15| Int)) (or (< |v_ULTIMATE.start_gcd_test_~a#1_15| |c_ULTIMATE.start_gcd_test_~b#1|) (forall ((|ULTIMATE.start_gcd_test_~a#1| Int)) (let ((.cse28 (mod |ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse29 (mod (+ .cse28 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (not (<= (mod (+ .cse28 .cse3) 256) 127)) (< .cse29 .cse5) (not (< |ULTIMATE.start_gcd_test_~a#1| 0)) (not (<= .cse29 127)) (not (<= (mod .cse28 256) 127)) (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_15| .cse29) 256) 0)))))))))))))) is different from true [2022-11-02 21:02:23,230 WARN L234 SmtUtils]: Spent 35.22s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:02:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-02 21:02:25,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:25,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354921431] [2022-11-02 21:02:25,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954016856] [2022-11-02 21:02:25,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954016856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:02:25,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:02:25,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-02 21:02:25,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611882412] [2022-11-02 21:02:25,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:25,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 21:02:25,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 21:02:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=193, Unknown=5, NotChecked=28, Total=272 [2022-11-02 21:02:25,365 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-11-02 21:02:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:27,120 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-02 21:02:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:02:27,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 [2022-11-02 21:02:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:27,122 INFO L225 Difference]: With dead ends: 41 [2022-11-02 21:02:27,122 INFO L226 Difference]: Without dead ends: 35 [2022-11-02 21:02:27,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=53, Invalid=218, Unknown=5, NotChecked=30, Total=306 [2022-11-02 21:02:27,124 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:27,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 321 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-11-02 21:02:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-02 21:02:27,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-02 21:02:27,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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) [2022-11-02 21:02:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-02 21:02:27,132 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 13 [2022-11-02 21:02:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:27,132 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-02 21:02:27,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2022-11-02 21:02:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-02 21:02:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 21:02:27,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:27,134 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:27,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:27,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:27,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1682229690, now seen corresponding path program 3 times [2022-11-02 21:02:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:27,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937420462] [2022-11-02 21:02:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:27,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:27,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:27,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890212720] [2022-11-02 21:02:27,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:02:27,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:27,360 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:27,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8436ba35-9cfb-4465-b5d5-ab2762b5ffda/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:02:27,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:02:27,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 21:02:27,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:03:10,978 WARN L234 SmtUtils]: Spent 32.72s on a formula simplification. DAG size of input: 63 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)