./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF --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 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:25:48,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:25:48,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:25:48,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:25:48,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:25:48,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:25:48,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:25:48,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:25:48,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:25:48,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:25:48,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:25:48,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:25:48,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:25:48,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:25:48,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:25:48,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:25:48,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:25:48,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:25:48,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:25:48,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:25:48,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:25:48,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:25:48,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:25:48,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:25:48,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:25:48,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:25:48,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:25:48,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:25:48,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:25:48,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:25:48,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:25:48,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:25:48,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:25:48,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:25:48,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:25:48,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:25:48,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:25:48,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:25:48,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:25:48,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:25:48,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:25:48,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:25:48,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:25:48,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:25:48,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:25:48,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:25:48,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:25:48,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:25:48,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:25:48,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:25:48,183 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:25:48,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:25:48,184 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:25:48,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:25:48,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:25:48,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:25:48,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:25:48,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:25:48,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:25:48,186 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:25:48,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:25:48,186 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:25:48,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:25:48,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:25:48,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:25:48,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:25:48,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:25:48,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:25:48,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:25:48,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:25:48,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:25:48,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:25:48,190 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:25:48,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:25:48,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:25:48,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:25:48,191 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_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17434adceb46f4d2d18d3a85d6d4ed55515fdf3dbd1a573601edbae0be0a7746 [2021-11-20 07:25:48,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:25:48,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:25:48,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:25:48,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:25:48,552 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:25:48,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/bitvector/gcd_3.c [2021-11-20 07:25:48,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/data/ec702fe6e/9fcdfbe9e7e4469aa1c0b878bdfd13f6/FLAG190558f02 [2021-11-20 07:25:49,232 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:25:49,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/sv-benchmarks/c/bitvector/gcd_3.c [2021-11-20 07:25:49,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/data/ec702fe6e/9fcdfbe9e7e4469aa1c0b878bdfd13f6/FLAG190558f02 [2021-11-20 07:25:49,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/data/ec702fe6e/9fcdfbe9e7e4469aa1c0b878bdfd13f6 [2021-11-20 07:25:49,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:25:49,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:25:49,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:25:49,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:25:49,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:25:49,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196a7514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49, skipping insertion in model container [2021-11-20 07:25:49,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:25:49,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:25:49,831 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_5089dc76-6501-4ed9-9cad-da9445634ae7/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2021-11-20 07:25:49,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:25:49,868 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:25:49,886 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_5089dc76-6501-4ed9-9cad-da9445634ae7/sv-benchmarks/c/bitvector/gcd_3.c[664,677] [2021-11-20 07:25:49,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:25:49,909 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:25:49,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49 WrapperNode [2021-11-20 07:25:49,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:25:49,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:25:49,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:25:49,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:25:49,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,951 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 47 [2021-11-20 07:25:49,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:25:49,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:25:49,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:25:49,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:25:49,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:25:49,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:25:49,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:25:49,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:25:49,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (1/1) ... [2021-11-20 07:25:49,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:25:50,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:50,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:25:50,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:25:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:25:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:25:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:25:50,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:25:50,144 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:25:50,146 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:25:50,277 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:25:50,285 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:25:50,285 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:25:50,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:25:50 BoogieIcfgContainer [2021-11-20 07:25:50,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:25:50,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:25:50,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:25:50,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:25:50,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:25:49" (1/3) ... [2021-11-20 07:25:50,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7602fa3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:25:50, skipping insertion in model container [2021-11-20 07:25:50,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:25:49" (2/3) ... [2021-11-20 07:25:50,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7602fa3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:25:50, skipping insertion in model container [2021-11-20 07:25:50,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:25:50" (3/3) ... [2021-11-20 07:25:50,299 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3.c [2021-11-20 07:25:50,307 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:25:50,307 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:25:50,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:25:50,379 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 [2021-11-20 07:25:50,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:25:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-11-20 07:25:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:25:50,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:50,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:50,414 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash 777289588, now seen corresponding path program 1 times [2021-11-20 07:25:50,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:50,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293486882] [2021-11-20 07:25:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:50,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:25:50,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:50,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293486882] [2021-11-20 07:25:50,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293486882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:25:50,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:25:50,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:25:50,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207647047] [2021-11-20 07:25:50,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:25:50,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:25:50,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:25:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:25:50,856 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-11-20 07:25:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:50,974 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-11-20 07:25:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:25:50,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2021-11-20 07:25:50,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:50,990 INFO L225 Difference]: With dead ends: 48 [2021-11-20 07:25:50,991 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 07:25:50,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:25:51,007 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:51,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:25:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 07:25:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11. [2021-11-20 07:25:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-11-20 07:25:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-20 07:25:51,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 10 [2021-11-20 07:25:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:51,054 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-20 07:25:51,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-11-20 07:25:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-20 07:25:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:25:51,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:51,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:51,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:25:51,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash -32057038, now seen corresponding path program 1 times [2021-11-20 07:25:51,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:51,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685474794] [2021-11-20 07:25:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:51,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:25:51,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:51,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685474794] [2021-11-20 07:25:51,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685474794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:25:51,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:25:51,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:25:51,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374193955] [2021-11-20 07:25:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:25:51,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:25:51,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:25:51,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:25:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:25:51,271 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-11-20 07:25:51,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:51,403 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-20 07:25:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:25:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 [2021-11-20 07:25:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:51,407 INFO L225 Difference]: With dead ends: 18 [2021-11-20 07:25:51,407 INFO L226 Difference]: Without dead ends: 12 [2021-11-20 07:25:51,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:25:51,416 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:51,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:25:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-20 07:25:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-20 07:25:51,425 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) [2021-11-20 07:25:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-20 07:25:51,426 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-11-20 07:25:51,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:51,428 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-20 07:25:51,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-11-20 07:25:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-20 07:25:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:25:51,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:51,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:25:51,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:25:51,436 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:25:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:51,437 INFO L85 PathProgramCache]: Analyzing trace with hash 607524954, now seen corresponding path program 1 times [2021-11-20 07:25:51,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:51,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909618753] [2021-11-20 07:25:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:51,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:51,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:25:51,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822767825] [2021-11-20 07:25:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:51,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:51,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:51,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:51,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:25:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:25:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:00,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:18,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:26:18,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909618753] [2021-11-20 07:26:18,514 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:26:18,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822767825] [2021-11-20 07:26:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822767825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:18,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-20 07:26:18,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225541695] [2021-11-20 07:26:18,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:26:18,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:26:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:26:18,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=157, Unknown=10, NotChecked=0, Total=210 [2021-11-20 07:26:18,518 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-11-20 07:26:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:23,264 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-20 07:26:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:26:23,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 [2021-11-20 07:26:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:23,266 INFO L225 Difference]: With dead ends: 19 [2021-11-20 07:26:23,266 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 07:26:23,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=70, Invalid=226, Unknown=10, NotChecked=0, Total=306 [2021-11-20 07:26:23,268 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:23,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2021-11-20 07:26:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 07:26:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-20 07:26:23,272 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) [2021-11-20 07:26:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-20 07:26:23,273 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-20 07:26:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:23,273 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-20 07:26:23,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-11-20 07:26:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-20 07:26:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:26:23,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:23,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:23,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:23,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-20 07:26:23,496 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1040269774, now seen corresponding path program 2 times [2021-11-20 07:26:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:26:23,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171553099] [2021-11-20 07:26:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:23,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:26:23,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:26:23,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547931585] [2021-11-20 07:26:23,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:26:23,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:26:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:26:23,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:26:23,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:26:23,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:26:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:26:23,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 07:26:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:52,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:27:19,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:19,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171553099] [2021-11-20 07:27:19,031 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:27:19,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547931585] [2021-11-20 07:27:19,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547931585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:19,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:19,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-20 07:27:19,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002651536] [2021-11-20 07:27:19,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:19,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:27:19,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:27:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=208, Unknown=9, NotChecked=0, Total=272 [2021-11-20 07:27:19,035 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-20 07:27:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:21,619 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-20 07:27:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:27:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 [2021-11-20 07:27:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:21,621 INFO L225 Difference]: With dead ends: 25 [2021-11-20 07:27:21,622 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 07:27:21,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=60, Invalid=236, Unknown=10, NotChecked=0, Total=306 [2021-11-20 07:27:21,624 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:21,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2021-11-20 07:27:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 07:27:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-20 07:27:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2021-11-20 07:27:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-20 07:27:21,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2021-11-20 07:27:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:21,629 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-20 07:27:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-20 07:27:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-20 07:27:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:27:21,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:21,630 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:27:21,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:21,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:21,836 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:27:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash -582298790, now seen corresponding path program 3 times [2021-11-20 07:27:21,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:21,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630440892] [2021-11-20 07:27:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:21,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:21,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:27:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521197000] [2021-11-20 07:27:21,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:27:21,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:21,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:21,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:21,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:27:21,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:27:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:27:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:27:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:46,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:23,045 WARN L227 SmtUtils]: Spent 12.94s on a formula simplification. DAG size of input: 77 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:29:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:48,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:29:48,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630440892] [2021-11-20 07:29:48,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:29:48,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521197000] [2021-11-20 07:29:48,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521197000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:48,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-20 07:29:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078881282] [2021-11-20 07:29:48,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:48,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:29:48,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:29:48,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:29:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=326, Unknown=9, NotChecked=0, Total=420 [2021-11-20 07:29:48,901 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-11-20 07:30:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:01,705 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-20 07:30:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:30:01,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 [2021-11-20 07:30:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:01,706 INFO L225 Difference]: With dead ends: 32 [2021-11-20 07:30:01,706 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 07:30:01,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 81.4s TimeCoverageRelationStatistics Valid=117, Invalid=472, Unknown=11, NotChecked=0, Total=600 [2021-11-20 07:30:01,709 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:01,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-11-20 07:30:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 07:30:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-11-20 07:30:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-11-20 07:30:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-20 07:30:01,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2021-11-20 07:30:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:01,715 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-20 07:30:01,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-11-20 07:30:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-20 07:30:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:30:01,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:01,716 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:01,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:01,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:01,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1283450600, now seen corresponding path program 1 times [2021-11-20 07:30:01,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:30:01,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114868926] [2021-11-20 07:30:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:01,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:30:01,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:30:01,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920490495] [2021-11-20 07:30:01,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:30:01,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:30:01,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:30:01,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:30:01,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5089dc76-6501-4ed9-9cad-da9445634ae7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:30:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:02,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 07:30:02,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:31:23,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:48,529 WARN L227 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 79 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:33:52,230 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse19 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse25 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse19) 256))) (let ((.cse28 (+ (- 256) .cse25))) (let ((.cse26 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse25) 256)) (.cse27 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256))) (let ((.cse12 (not (= (mod (mod .cse28 .cse27) 256) 0))) (.cse13 (<= .cse27 |c_ULTIMATE.start_main_~x~0#1|)) (.cse15 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse19) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (<= .cse26 |c_ULTIMATE.start_main_~x~0#1|)) (.cse6 (= .cse25 0)) (.cse7 (not (= (mod (mod .cse25 .cse26) 256) 0)))) (let ((.cse0 (or .cse4 .cse5 .cse6 .cse7)) (.cse10 (< 127 .cse25)) (.cse14 (<= .cse25 127)) (.cse2 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (<= .cse15 127)) (.cse11 (or .cse12 .cse4 .cse13)) (.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse17 (mod .cse19 256))) (and (or (let ((.cse8 (= .cse19 0))) (let ((.cse1 (let ((.cse16 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256))) (or (<= .cse16 |c_ULTIMATE.start_main_~x~0#1|) (not (= (mod (mod .cse17 .cse16) 256) 0)) (and (not .cse8) .cse18) (= 0 .cse17)))) (.cse3 (< 127 .cse15))) (and (or (and (or (and .cse0 .cse1) .cse2 .cse3) (or (and .cse1 (or .cse4 .cse5 .cse6 .cse7 .cse8)) .cse2 .cse9)) .cse10) (or (and (or .cse2 .cse9 (and .cse1 .cse11)) (or (and .cse1 (or .cse12 .cse4 .cse13 .cse8)) .cse2 .cse3)) .cse14)))) (< 127 .cse17)) (or (<= .cse17 127) (let ((.cse21 (let ((.cse23 (+ (- 256) .cse17))) (let ((.cse24 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256))) (or (not (= (mod (mod .cse23 .cse24) 256) 0)) .cse18 (<= .cse24 |c_ULTIMATE.start_main_~x~0#1|)))))) (and (or (let ((.cse20 (and .cse0 .cse21))) (and (or .cse2 .cse9 .cse20) (or .cse2 .cse20))) .cse10) (or .cse14 (let ((.cse22 (and .cse11 .cse21))) (and (or .cse2 .cse22) (or .cse2 .cse22 .cse9)))))))))))))) (<= |c_ULTIMATE.start_main_~x~0#1| 0)) is different from false [2021-11-20 07:33:54,267 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse19 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse25 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse19) 256))) (let ((.cse28 (+ (- 256) .cse25))) (let ((.cse26 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse25) 256)) (.cse27 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256))) (let ((.cse12 (not (= (mod (mod .cse28 .cse27) 256) 0))) (.cse13 (<= .cse27 |c_ULTIMATE.start_main_~x~0#1|)) (.cse15 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse19) 256)) (.cse4 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (<= .cse26 |c_ULTIMATE.start_main_~x~0#1|)) (.cse6 (= .cse25 0)) (.cse7 (not (= (mod (mod .cse25 .cse26) 256) 0)))) (let ((.cse0 (or .cse4 .cse5 .cse6 .cse7)) (.cse10 (< 127 .cse25)) (.cse14 (<= .cse25 127)) (.cse2 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (<= .cse15 127)) (.cse11 (or .cse12 .cse4 .cse13)) (.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse17 (mod .cse19 256))) (and (or (let ((.cse8 (= .cse19 0))) (let ((.cse1 (let ((.cse16 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256))) (or (<= .cse16 |c_ULTIMATE.start_main_~x~0#1|) (not (= (mod (mod .cse17 .cse16) 256) 0)) (and (not .cse8) .cse18) (= 0 .cse17)))) (.cse3 (< 127 .cse15))) (and (or (and (or (and .cse0 .cse1) .cse2 .cse3) (or (and .cse1 (or .cse4 .cse5 .cse6 .cse7 .cse8)) .cse2 .cse9)) .cse10) (or (and (or .cse2 .cse9 (and .cse1 .cse11)) (or (and .cse1 (or .cse12 .cse4 .cse13 .cse8)) .cse2 .cse3)) .cse14)))) (< 127 .cse17)) (or (<= .cse17 127) (let ((.cse21 (let ((.cse23 (+ (- 256) .cse17))) (let ((.cse24 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse23) 256))) (or (not (= (mod (mod .cse23 .cse24) 256) 0)) .cse18 (<= .cse24 |c_ULTIMATE.start_main_~x~0#1|)))))) (and (or (let ((.cse20 (and .cse0 .cse21))) (and (or .cse2 .cse9 .cse20) (or .cse2 .cse20))) .cse10) (or .cse14 (let ((.cse22 (and .cse11 .cse21))) (and (or .cse2 .cse22) (or .cse2 .cse22 .cse9)))))))))))))) (<= |c_ULTIMATE.start_main_~x~0#1| 0)) is different from true