./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX --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 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:58:37,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:58:37,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:58:37,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:58:37,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:58:37,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:58:37,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:58:37,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:58:37,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:58:37,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:58:37,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:58:37,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:58:37,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:58:37,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:58:37,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:58:37,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:58:37,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:58:37,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:58:37,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:58:37,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:58:37,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:58:37,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:58:37,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:58:37,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:58:37,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:58:37,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:58:37,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:58:37,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:58:37,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:58:37,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:58:37,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:58:37,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:58:37,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:58:37,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:58:37,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:58:37,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:58:37,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:58:37,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:58:37,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:58:37,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:58:37,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:58:37,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:58:37,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:58:37,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:58:37,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:58:37,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:58:37,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:58:37,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:58:37,619 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:58:37,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:58:37,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:58:37,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:58:37,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:58:37,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:58:37,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:58:37,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:58:37,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:58:37,623 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:58:37,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:58:37,623 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:58:37,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:58:37,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:58:37,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:58:37,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:58:37,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:58:37,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:58:37,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:58:37,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:58:37,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:58:37,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:58:37,626 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:58:37,626 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:58:37,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:58:37,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:58:37,627 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_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739715c3f9b6cd78741b6d155210624f17d4bf167a3be4c6127f06707080edde [2021-11-09 08:58:37,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:58:37,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:58:37,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:58:37,961 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:58:37,962 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:58:37,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/bitvector/gcd_1.c [2021-11-09 08:58:38,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/data/1d491b15c/086de623a02245d79d1a3bbf6741be30/FLAG967b8539a [2021-11-09 08:58:38,486 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:58:38,487 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/sv-benchmarks/c/bitvector/gcd_1.c [2021-11-09 08:58:38,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/data/1d491b15c/086de623a02245d79d1a3bbf6741be30/FLAG967b8539a [2021-11-09 08:58:38,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/data/1d491b15c/086de623a02245d79d1a3bbf6741be30 [2021-11-09 08:58:38,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:58:38,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:58:38,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:58:38,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:58:38,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:58:38,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:58:38" (1/1) ... [2021-11-09 08:58:38,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f992995 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:38, skipping insertion in model container [2021-11-09 08:58:38,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:58:38" (1/1) ... [2021-11-09 08:58:38,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:58:38,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:58:39,078 WARN L228 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_49218224-e13b-44f2-b0a6-78a4694c14e5/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2021-11-09 08:58:39,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:58:39,131 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:58:39,154 WARN L228 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_49218224-e13b-44f2-b0a6-78a4694c14e5/sv-benchmarks/c/bitvector/gcd_1.c[664,677] [2021-11-09 08:58:39,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:58:39,186 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:58:39,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39 WrapperNode [2021-11-09 08:58:39,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:58:39,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:58:39,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:58:39,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:58:39,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:58:39,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:58:39,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:58:39,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:58:39,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:58:39,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:58:39,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:58:39,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:58:39,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (1/1) ... [2021-11-09 08:58:39,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:58:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:39,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:58:39,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:58:39,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:58:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:58:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:58:39,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:58:39,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:58:39,657 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 08:58:39,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:58:39 BoogieIcfgContainer [2021-11-09 08:58:39,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:58:39,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:58:39,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:58:39,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:58:39,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:58:38" (1/3) ... [2021-11-09 08:58:39,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e80f3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:58:39, skipping insertion in model container [2021-11-09 08:58:39,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:58:39" (2/3) ... [2021-11-09 08:58:39,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e80f3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:58:39, skipping insertion in model container [2021-11-09 08:58:39,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:58:39" (3/3) ... [2021-11-09 08:58:39,669 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1.c [2021-11-09 08:58:39,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:58:39,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:58:39,719 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:58:39,727 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 [2021-11-09 08:58:39,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:58:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2021-11-09 08:58:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:58:39,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:39,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:39,749 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2002478831, now seen corresponding path program 1 times [2021-11-09 08:58:39,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:39,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013446103] [2021-11-09 08:58:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:39,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:39,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:58:39,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341100785] [2021-11-09 08:58:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:39,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:39,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:39,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:39,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:58:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:39,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:58:39,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:40,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:40,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013446103] [2021-11-09 08:58:40,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:58:40,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341100785] [2021-11-09 08:58:40,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341100785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:58:40,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:58:40,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:58:40,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558770566] [2021-11-09 08:58:40,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:58:40,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:40,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:58:40,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:40,121 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-09 08:58:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:40,170 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2021-11-09 08:58:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:58:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-11-09 08:58:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:40,199 INFO L225 Difference]: With dead ends: 26 [2021-11-09 08:58:40,199 INFO L226 Difference]: Without dead ends: 12 [2021-11-09 08:58:40,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:58:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-09 08:58:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-09 08:58:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-11-09 08:58:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-09 08:58:40,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-11-09 08:58:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:40,249 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-09 08:58:40,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-09 08:58:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-09 08:58:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:58:40,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:40,252 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:40,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:40,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:40,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1895646932, now seen corresponding path program 1 times [2021-11-09 08:58:40,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:40,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815158536] [2021-11-09 08:58:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:40,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:40,527 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:58:40,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400530011] [2021-11-09 08:58:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:40,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:40,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:40,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:40,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:58:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:58:40,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 08:58:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:58:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:58:40,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:58:40,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815158536] [2021-11-09 08:58:40,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:58:40,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400530011] [2021-11-09 08:58:40,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400530011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:58:40,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:58:40,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:58:40,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882181446] [2021-11-09 08:58:40,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:58:40,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:58:40,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:58:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:58:40,860 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-11-09 08:58:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:58:40,945 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-09 08:58:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:58:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 [2021-11-09 08:58:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:58:40,947 INFO L225 Difference]: With dead ends: 18 [2021-11-09 08:58:40,947 INFO L226 Difference]: Without dead ends: 13 [2021-11-09 08:58:40,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:58:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-09 08:58:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-09 08:58:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-11-09 08:58:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-09 08:58:40,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-09 08:58:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:58:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-09 08:58:40,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2021-11-09 08:58:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-09 08:58:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:58:40,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:58:40,954 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:58:40,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:58:41,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:41,173 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:58:41,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:58:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1416141937, now seen corresponding path program 2 times [2021-11-09 08:58:41,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:58:41,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251156732] [2021-11-09 08:58:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:58:41,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:58:41,197 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:58:41,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045056767] [2021-11-09 08:58:41,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:58:41,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:58:41,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:58:41,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:58:41,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:58:50,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:58:50,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:58:50,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 08:58:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:59:58,780 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_gcd_test_~b (mod (mod c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_gcd_test_~a) 256)) (< 0 c_ULTIMATE.start_main_~y~0) (not (= c_ULTIMATE.start_gcd_test_~a 0)) (<= c_ULTIMATE.start_main_~y~0 127) (exists ((v_ULTIMATE.start_gcd_test_~a_9 Int)) (and (= (mod v_ULTIMATE.start_gcd_test_~a_9 c_ULTIMATE.start_main_~y~0) 0) (= c_ULTIMATE.start_gcd_test_~a (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_9 255) 256) c_ULTIMATE.start_main_~y~0) 256)) (< v_ULTIMATE.start_gcd_test_~a_9 0) (<= 0 (+ 128 v_ULTIMATE.start_gcd_test_~a_9))))) is different from false [2021-11-09 09:00:09,600 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (mod c_ULTIMATE.start_main_~y~0 c_ULTIMATE.start_gcd_test_~a) 256) 0) (< 0 c_ULTIMATE.start_main_~y~0) (not (= c_ULTIMATE.start_gcd_test_~a 0)) (<= c_ULTIMATE.start_main_~y~0 127) (exists ((v_ULTIMATE.start_gcd_test_~a_9 Int)) (and (= (mod v_ULTIMATE.start_gcd_test_~a_9 c_ULTIMATE.start_main_~y~0) 0) (= c_ULTIMATE.start_gcd_test_~a (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_9 255) 256) c_ULTIMATE.start_main_~y~0) 256)) (< v_ULTIMATE.start_gcd_test_~a_9 0) (<= 0 (+ 128 v_ULTIMATE.start_gcd_test_~a_9))))) is different from false [2021-11-09 09:00:21,895 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((v_ULTIMATE.start_gcd_test_~a_9 Int)) (and (= (mod v_ULTIMATE.start_gcd_test_~a_9 c_ULTIMATE.start_main_~y~0) 0) (< v_ULTIMATE.start_gcd_test_~a_9 0) (= |c_ULTIMATE.start_gcd_test_#res| (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_9 255) 256) c_ULTIMATE.start_main_~y~0) 256)) (<= 0 (+ 128 v_ULTIMATE.start_gcd_test_~a_9)))) (not (= |c_ULTIMATE.start_gcd_test_#res| 0)) (< 0 c_ULTIMATE.start_main_~y~0) (<= c_ULTIMATE.start_main_~y~0 127) (= (mod (mod c_ULTIMATE.start_main_~y~0 |c_ULTIMATE.start_gcd_test_#res|) 256) 0)) is different from false [2021-11-09 09:01:43,094 WARN L838 $PredicateComparison]: unable to prove that (and (<= 0 c_ULTIMATE.start___VERIFIER_assert_~cond) (exists ((v_ULTIMATE.start_gcd_test_~a_9 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_9 255) 256) ULTIMATE.start_main_~y~0) 256))) (and (= (mod v_ULTIMATE.start_gcd_test_~a_9 ULTIMATE.start_main_~y~0) 0) (< v_ULTIMATE.start_gcd_test_~a_9 0) (< 0 ULTIMATE.start_main_~y~0) (not (= .cse0 0)) (<= 0 (+ 128 v_ULTIMATE.start_gcd_test_~a_9)) (= (mod (mod ULTIMATE.start_main_~y~0 .cse0) 256) 0))))) is different from false [2021-11-09 09:02:24,753 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_ULTIMATE.start_gcd_test_~a_9 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_9 255) 256) ULTIMATE.start_main_~y~0) 256))) (and (= (mod v_ULTIMATE.start_gcd_test_~a_9 ULTIMATE.start_main_~y~0) 0) (< v_ULTIMATE.start_gcd_test_~a_9 0) (< 0 ULTIMATE.start_main_~y~0) (not (= .cse0 0)) (<= 0 (+ 128 v_ULTIMATE.start_gcd_test_~a_9)) (= (mod (mod ULTIMATE.start_main_~y~0 .cse0) 256) 0)))) is different from false [2021-11-09 09:02:26,757 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ULTIMATE.start_gcd_test_~a_9 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_9 255) 256) ULTIMATE.start_main_~y~0) 256))) (and (= (mod v_ULTIMATE.start_gcd_test_~a_9 ULTIMATE.start_main_~y~0) 0) (< v_ULTIMATE.start_gcd_test_~a_9 0) (< 0 ULTIMATE.start_main_~y~0) (not (= .cse0 0)) (<= 0 (+ 128 v_ULTIMATE.start_gcd_test_~a_9)) (= (mod (mod ULTIMATE.start_main_~y~0 .cse0) 256) 0)))) is different from true [2021-11-09 09:02:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-09 09:02:26,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:26,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251156732] [2021-11-09 09:02:26,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:02:26,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045056767] [2021-11-09 09:02:26,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045056767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:26,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:02:26,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:02:26,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425053310] [2021-11-09 09:02:26,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:02:26,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:02:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=24, Unknown=6, NotChecked=60, Total=110 [2021-11-09 09:02:26,762 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 11 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) [2021-11-09 09:02:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:35,603 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-09 09:02:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:02:35,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 11 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 [2021-11-09 09:02:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:35,604 INFO L225 Difference]: With dead ends: 28 [2021-11-09 09:02:35,604 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 09:02:35,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=33, Invalid=52, Unknown=7, NotChecked=90, Total=182 [2021-11-09 09:02:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 09:02:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-11-09 09:02:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:02:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-09 09:02:35,608 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-11-09 09:02:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:35,608 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-09 09:02:35,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.2) internal successors, (12), 11 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) [2021-11-09 09:02:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-09 09:02:35,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:02:35,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:35,609 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:02:35,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:02:35,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:35,809 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2096200307, now seen corresponding path program 1 times [2021-11-09 09:02:35,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:35,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366701508] [2021-11-09 09:02:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:35,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:35,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:02:35,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985991190] [2021-11-09 09:02:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:35,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:35,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:02:35,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:02:35,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:02:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:02:35,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:02:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:02:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:02:36,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:02:36,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366701508] [2021-11-09 09:02:36,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:02:36,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985991190] [2021-11-09 09:02:36,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985991190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:02:36,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:02:36,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-09 09:02:36,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916753742] [2021-11-09 09:02:36,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:02:36,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:02:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:02:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:02:36,349 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-11-09 09:02:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:02:36,385 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-11-09 09:02:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:02:36,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2021-11-09 09:02:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:02:36,386 INFO L225 Difference]: With dead ends: 23 [2021-11-09 09:02:36,387 INFO L226 Difference]: Without dead ends: 14 [2021-11-09 09:02:36,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:02:36,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-09 09:02:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-09 09:02:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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) [2021-11-09 09:02:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-11-09 09:02:36,389 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-11-09 09:02:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:02:36,390 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-11-09 09:02:36,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-11-09 09:02:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-11-09 09:02:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:02:36,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:02:36,391 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:02:36,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:02:36,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:36,603 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:02:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:02:36,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1002381772, now seen corresponding path program 3 times [2021-11-09 09:02:36,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:02:36,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663916697] [2021-11-09 09:02:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:02:36,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:02:36,613 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:02:36,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152048843] [2021-11-09 09:02:36,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:02:36,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:02:36,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:02:36,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:02:36,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:02:51,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:02:51,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:02:51,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:02:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:04:46,987 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_ULTIMATE.start_gcd_test_~a_14 Int) (v_ULTIMATE.start_gcd_test_~a_16 Int)) (let ((.cse0 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_14 255) 256) v_ULTIMATE.start_gcd_test_~a_16) 256))) (and (< v_ULTIMATE.start_gcd_test_~a_14 0) (= c_ULTIMATE.start_gcd_test_~b (mod (mod v_ULTIMATE.start_gcd_test_~a_16 .cse0) 256)) (= (mod v_ULTIMATE.start_gcd_test_~a_14 v_ULTIMATE.start_gcd_test_~a_16) 0) (< 0 v_ULTIMATE.start_gcd_test_~a_16) (= .cse0 c_ULTIMATE.start_gcd_test_~a) (<= 0 (+ v_ULTIMATE.start_gcd_test_~a_14 128)) (not (= .cse0 0))))) is different from false [2021-11-09 09:06:24,715 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_ULTIMATE.start_gcd_test_~a_14 Int) (v_ULTIMATE.start_gcd_test_~a_16 Int)) (let ((.cse1 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_14 255) 256) v_ULTIMATE.start_gcd_test_~a_16) 256))) (let ((.cse0 (mod (mod v_ULTIMATE.start_gcd_test_~a_16 .cse1) 256))) (and (not (= .cse0 0)) (< v_ULTIMATE.start_gcd_test_~a_14 0) (= (mod v_ULTIMATE.start_gcd_test_~a_14 v_ULTIMATE.start_gcd_test_~a_16) 0) (< 0 v_ULTIMATE.start_gcd_test_~a_16) (= c_ULTIMATE.start_gcd_test_~b (mod (mod .cse1 .cse0) 256)) (<= 0 (+ v_ULTIMATE.start_gcd_test_~a_14 128)) (not (= .cse1 0)) (= c_ULTIMATE.start_gcd_test_~a .cse0))))) is different from false [2021-11-09 09:07:33,683 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_ULTIMATE.start_gcd_test_~a_14 Int) (v_ULTIMATE.start_gcd_test_~a_16 Int)) (let ((.cse0 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_14 255) 256) v_ULTIMATE.start_gcd_test_~a_16) 256))) (let ((.cse1 (mod (mod v_ULTIMATE.start_gcd_test_~a_16 .cse0) 256))) (and (= 0 (mod (mod .cse0 .cse1) 256)) (not (= .cse1 0)) (< v_ULTIMATE.start_gcd_test_~a_14 0) (= (mod v_ULTIMATE.start_gcd_test_~a_14 v_ULTIMATE.start_gcd_test_~a_16) 0) (< 0 v_ULTIMATE.start_gcd_test_~a_16) (<= 0 (+ v_ULTIMATE.start_gcd_test_~a_14 128)) (not (= .cse0 0)) (= c_ULTIMATE.start_gcd_test_~a .cse1))))) is different from false [2021-11-09 09:08:42,613 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_ULTIMATE.start_gcd_test_~a_14 Int) (v_ULTIMATE.start_gcd_test_~a_16 Int)) (let ((.cse0 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_14 255) 256) v_ULTIMATE.start_gcd_test_~a_16) 256))) (let ((.cse1 (mod (mod v_ULTIMATE.start_gcd_test_~a_16 .cse0) 256))) (and (= 0 (mod (mod .cse0 .cse1) 256)) (= |c_ULTIMATE.start_gcd_test_#res| .cse1) (not (= .cse1 0)) (< v_ULTIMATE.start_gcd_test_~a_14 0) (= (mod v_ULTIMATE.start_gcd_test_~a_14 v_ULTIMATE.start_gcd_test_~a_16) 0) (< 0 v_ULTIMATE.start_gcd_test_~a_16) (<= 0 (+ v_ULTIMATE.start_gcd_test_~a_14 128)) (not (= .cse0 0)))))) is different from false [2021-11-09 09:09:41,477 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_ULTIMATE.start_gcd_test_~a_14 Int) (v_ULTIMATE.start_gcd_test_~a_16 Int)) (let ((.cse0 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_14 255) 256) v_ULTIMATE.start_gcd_test_~a_16) 256))) (let ((.cse1 (mod (mod v_ULTIMATE.start_gcd_test_~a_16 .cse0) 256))) (and (= 0 (mod (mod .cse0 .cse1) 256)) (not (= .cse1 0)) (< v_ULTIMATE.start_gcd_test_~a_14 0) (= (mod v_ULTIMATE.start_gcd_test_~a_14 v_ULTIMATE.start_gcd_test_~a_16) 0) (< 0 v_ULTIMATE.start_gcd_test_~a_16) (<= 0 (+ v_ULTIMATE.start_gcd_test_~a_14 128)) (not (= .cse0 0)))))) is different from false [2021-11-09 09:09:43,482 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ULTIMATE.start_gcd_test_~a_14 Int) (v_ULTIMATE.start_gcd_test_~a_16 Int)) (let ((.cse0 (mod (mod (mod (* v_ULTIMATE.start_gcd_test_~a_14 255) 256) v_ULTIMATE.start_gcd_test_~a_16) 256))) (let ((.cse1 (mod (mod v_ULTIMATE.start_gcd_test_~a_16 .cse0) 256))) (and (= 0 (mod (mod .cse0 .cse1) 256)) (not (= .cse1 0)) (< v_ULTIMATE.start_gcd_test_~a_14 0) (= (mod v_ULTIMATE.start_gcd_test_~a_14 v_ULTIMATE.start_gcd_test_~a_16) 0) (< 0 v_ULTIMATE.start_gcd_test_~a_16) (<= 0 (+ v_ULTIMATE.start_gcd_test_~a_14 128)) (not (= .cse0 0)))))) is different from true [2021-11-09 09:10:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-09 09:10:40,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:10:40,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663916697] [2021-11-09 09:10:40,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:10:40,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152048843] [2021-11-09 09:10:40,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152048843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:10:40,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:10:40,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-09 09:10:40,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995169650] [2021-11-09 09:10:40,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:10:40,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:10:40,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:10:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=24, Unknown=7, NotChecked=60, Total=110 [2021-11-09 09:10:40,522 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-11-09 09:10:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:10:56,023 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-11-09 09:10:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:10:56,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 [2021-11-09 09:10:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:10:56,024 INFO L225 Difference]: With dead ends: 20 [2021-11-09 09:10:56,025 INFO L226 Difference]: Without dead ends: 15 [2021-11-09 09:10:56,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=31, Invalid=51, Unknown=10, NotChecked=90, Total=182 [2021-11-09 09:10:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-09 09:10:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-09 09:10:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-11-09 09:10:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-09 09:10:56,029 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-11-09 09:10:56,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:10:56,029 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-09 09:10:56,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-11-09 09:10:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-09 09:10:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:10:56,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:10:56,030 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:10:56,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:10:56,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:56,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:10:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:10:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1060718545, now seen corresponding path program 4 times [2021-11-09 09:10:56,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:10:56,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102524045] [2021-11-09 09:10:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:10:56,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:10:56,274 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:10:56,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833803412] [2021-11-09 09:10:56,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:10:56,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:10:56,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:10:56,297 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:10:56,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49218224-e13b-44f2-b0a6-78a4694c14e5/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:11:05,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:11:05,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:11:05,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 09:11:05,077 INFO L286 TraceCheckSpWp]: Computing forward predicates...