./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7443921b0608d3c2ff1c61e12bf7cf129e5c1aecf22f0fb9785817b90c162e7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:18:04,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:18:04,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:18:04,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:18:04,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:18:04,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:18:04,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:18:04,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:18:04,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:18:04,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:18:04,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:18:04,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:18:04,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:18:04,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:18:04,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:18:04,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:18:04,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:18:04,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:18:04,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:18:04,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:18:04,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:18:04,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:18:04,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:18:04,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:18:04,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:18:04,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:18:04,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:18:04,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:18:04,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:18:04,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:18:04,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:18:04,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:18:04,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:18:04,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:18:04,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:18:04,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:18:04,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:18:04,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:18:04,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:18:04,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:18:04,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:18:04,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:18:04,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:18:04,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:18:04,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:18:04,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:18:04,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:18:04,215 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:18:04,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:18:04,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:18:04,215 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:18:04,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:18:04,215 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:18:04,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:18:04,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:18:04,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:18:04,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:18:04,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:18:04,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:18:04,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:18:04,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:18:04,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:18:04,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:18:04,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:18:04,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:18:04,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:18:04,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:18:04,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:18:04,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:18:04,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:18:04,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:18:04,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:18:04,229 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:18:04,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:18:04,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:18:04,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:18:04,229 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_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7443921b0608d3c2ff1c61e12bf7cf129e5c1aecf22f0fb9785817b90c162e7 [2021-12-06 23:18:04,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:18:04,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:18:04,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:18:04,442 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:18:04,443 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:18:04,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/gcd_3+newton_2_7.i [2021-12-06 23:18:04,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/data/dac6f5ff4/160300a3f8154be3b072b9c7e4bb1a01/FLAG3886a97da [2021-12-06 23:18:04,861 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:18:04,861 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i [2021-12-06 23:18:04,866 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/data/dac6f5ff4/160300a3f8154be3b072b9c7e4bb1a01/FLAG3886a97da [2021-12-06 23:18:04,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/data/dac6f5ff4/160300a3f8154be3b072b9c7e4bb1a01 [2021-12-06 23:18:04,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:18:04,879 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:18:04,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:18:04,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:18:04,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:18:04,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:18:04" (1/1) ... [2021-12-06 23:18:04,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b3e138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:04, skipping insertion in model container [2021-12-06 23:18:04,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:18:04" (1/1) ... [2021-12-06 23:18:04,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:18:04,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:18:05,002 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_a5064ea5-0094-4147-9adc-604cc4c74e00/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[1226,1239] [2021-12-06 23:18:05,026 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_a5064ea5-0094-4147-9adc-604cc4c74e00/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[2841,2854] [2021-12-06 23:18:05,028 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:18:05,036 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:18:05,049 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_a5064ea5-0094-4147-9adc-604cc4c74e00/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[1226,1239] [2021-12-06 23:18:05,061 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_a5064ea5-0094-4147-9adc-604cc4c74e00/sv-benchmarks/c/combinations/gcd_3+newton_2_7.i[2841,2854] [2021-12-06 23:18:05,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:18:05,076 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:18:05,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05 WrapperNode [2021-12-06 23:18:05,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:18:05,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:18:05,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:18:05,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:18:05,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,114 INFO L137 Inliner]: procedures = 27, calls = 16, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-12-06 23:18:05,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:18:05,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:18:05,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:18:05,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:18:05,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:18:05,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:18:05,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:18:05,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:18:05,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (1/1) ... [2021-12-06 23:18:05,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:18:05,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:18:05,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:18:05,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:18:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:18:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-12-06 23:18:05,194 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-12-06 23:18:05,194 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-06 23:18:05,194 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-06 23:18:05,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:18:05,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:18:05,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:18:05,246 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:18:05,248 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:18:05,358 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:18:05,363 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:18:05,363 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 23:18:05,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:18:05 BoogieIcfgContainer [2021-12-06 23:18:05,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:18:05,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:18:05,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:18:05,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:18:05,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:18:04" (1/3) ... [2021-12-06 23:18:05,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10649ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:18:05, skipping insertion in model container [2021-12-06 23:18:05,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:18:05" (2/3) ... [2021-12-06 23:18:05,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10649ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:18:05, skipping insertion in model container [2021-12-06 23:18:05,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:18:05" (3/3) ... [2021-12-06 23:18:05,371 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_7.i [2021-12-06 23:18:05,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:18:05,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 23:18:05,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:18:05,417 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:18:05,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 23:18:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:18:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 23:18:05,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:18:05,435 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:18:05,436 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:18:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:18:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2021-12-06 23:18:05,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:18:05,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003311936] [2021-12-06 23:18:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:18:05,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:18:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:18:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:18:05,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:18:05,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003311936] [2021-12-06 23:18:05,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003311936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:18:05,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:18:05,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:18:05,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492880080] [2021-12-06 23:18:05,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:18:05,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:18:05,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:18:05,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:18:05,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:18:05,622 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:18:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:18:05,676 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-12-06 23:18:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:18:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 23:18:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:18:05,685 INFO L225 Difference]: With dead ends: 90 [2021-12-06 23:18:05,685 INFO L226 Difference]: Without dead ends: 36 [2021-12-06 23:18:05,687 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 [2021-12-06 23:18:05,690 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:18:05,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:18:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-06 23:18:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2021-12-06 23:18:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:18:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-12-06 23:18:05,720 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2021-12-06 23:18:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:18:05,720 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-12-06 23:18:05,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:18:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-12-06 23:18:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 23:18:05,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:18:05,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:18:05,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:18:05,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:18:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:18:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1776235347, now seen corresponding path program 1 times [2021-12-06 23:18:05,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:18:05,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084241728] [2021-12-06 23:18:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:18:05,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:18:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:18:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:18:05,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:18:05,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084241728] [2021-12-06 23:18:05,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084241728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:18:05,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:18:05,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:18:05,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493334368] [2021-12-06 23:18:05,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:18:05,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:18:05,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:18:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:18:05,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:18:05,814 INFO L87 Difference]: Start difference. First operand 29 states and 32 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) [2021-12-06 23:18:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:18:05,867 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-06 23:18:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:18:05,867 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 [2021-12-06 23:18:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:18:05,868 INFO L225 Difference]: With dead ends: 36 [2021-12-06 23:18:05,869 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 23:18:05,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:18:05,871 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 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 [2021-12-06 23:18:05,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:18:05,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 23:18:05,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-06 23:18:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:18:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-06 23:18:05,879 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2021-12-06 23:18:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:18:05,879 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-06 23:18:05,879 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) [2021-12-06 23:18:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-06 23:18:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 23:18:05,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:18:05,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:18:05,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:18:05,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:18:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:18:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2021-12-06 23:18:05,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:18:05,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567933043] [2021-12-06 23:18:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:18:05,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:18:05,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:18:05,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703141049] [2021-12-06 23:18:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:18:05,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:18:05,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:18:05,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:18:05,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:18:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:18:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 23:18:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:18:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:18:41,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:18:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:18:46,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:18:46,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567933043] [2021-12-06 23:18:46,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:18:46,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703141049] [2021-12-06 23:18:46,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703141049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:18:46,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:18:46,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-12-06 23:18:46,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223204848] [2021-12-06 23:18:46,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:18:46,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:18:46,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:18:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:18:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=205, Unknown=13, NotChecked=0, Total=272 [2021-12-06 23:18:46,068 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2021-12-06 23:18:47,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:18:47,070 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-06 23:18:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:18:47,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) Word has length 12 [2021-12-06 23:18:47,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:18:47,072 INFO L225 Difference]: With dead ends: 42 [2021-12-06 23:18:47,072 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 23:18:47,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=74, Invalid=255, Unknown=13, NotChecked=0, Total=342 [2021-12-06 23:18:47,073 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:18:47,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 231 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-06 23:18:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 23:18:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-06 23:18:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:18:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-06 23:18:47,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2021-12-06 23:18:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:18:47,078 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-06 23:18:47,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2021-12-06 23:18:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-06 23:18:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 23:18:47,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:18:47,079 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:18:47,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:18:47,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:18:47,281 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:18:47,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:18:47,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1561924787, now seen corresponding path program 2 times [2021-12-06 23:18:47,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:18:47,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904699429] [2021-12-06 23:18:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:18:47,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:18:47,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:18:47,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055551002] [2021-12-06 23:18:47,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:18:47,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:18:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:18:47,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:18:47,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:18:47,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:18:47,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:18:47,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 23:18:47,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:18:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:18:51,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:19:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:19:21,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:19:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904699429] [2021-12-06 23:19:21,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:19:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055551002] [2021-12-06 23:19:21,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055551002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:19:21,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:19:21,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-06 23:19:21,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616910884] [2021-12-06 23:19:21,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:19:21,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 23:19:21,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:19:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 23:19:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=181, Unknown=10, NotChecked=0, Total=240 [2021-12-06 23:19:21,532 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:19:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:19:21,730 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-06 23:19:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:19:21,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 23:19:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:19:21,731 INFO L225 Difference]: With dead ends: 43 [2021-12-06 23:19:21,731 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 23:19:21,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=49, Invalid=181, Unknown=10, NotChecked=0, Total=240 [2021-12-06 23:19:21,733 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:19:21,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-06 23:19:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 23:19:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 23:19:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:19:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-06 23:19:21,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 13 [2021-12-06 23:19:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:19:21,738 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-06 23:19:21,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:19:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-06 23:19:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 23:19:21,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:19:21,739 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:19:21,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:19:21,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:19:21,940 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:19:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:19:21,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 3 times [2021-12-06 23:19:21,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:19:21,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779833265] [2021-12-06 23:19:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:19:21,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:19:21,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:19:21,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074877070] [2021-12-06 23:19:21,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:19:21,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:19:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:19:21,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:19:21,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:19:22,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:19:22,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:19:22,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 23:19:22,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:19:41,505 WARN L227 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:20:32,803 WARN L227 SmtUtils]: Spent 20.52s on a formula simplification. DAG size of input: 60 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:20:53,771 WARN L227 SmtUtils]: Spent 7.98s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:21:07,638 WARN L227 SmtUtils]: Spent 6.86s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:21:11,413 WARN L860 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (not (= |c_ULTIMATE.start_main1_~g~0#1| 0)) (or (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse0 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse3 (+ .cse0 (- 256)))) (let ((.cse1 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse3) 256))) (let ((.cse2 (mod .cse3 .cse1))) (and (< 127 .cse0) (= (+ 256 |c_ULTIMATE.start_main1_~g~0#1|) (mod (+ (* .cse1 255) .cse2) 256)) (not (= .cse2 0)) (= (mod (mod .cse1 |c_ULTIMATE.start_main1_~g~0#1|) 256) 0) (not (= .cse1 0)))))))) (exists ((|v_ULTIMATE.start_gcd_test_~b#1_20| Int)) (let ((.cse5 (mod (* |v_ULTIMATE.start_gcd_test_~b#1_20| 255) 256))) (let ((.cse4 (mod (mod |c_ULTIMATE.start_main1_~x~0#1| .cse5) 256))) (and (not (= .cse4 0)) (= (mod (mod .cse5 .cse4) 256) |c_ULTIMATE.start_main1_~g~0#1|) (= (mod (mod .cse4 |c_ULTIMATE.start_main1_~g~0#1|) 256) 0) (<= .cse5 127)))))) (<= |c_ULTIMATE.start_main1_~g~0#1| 127)) is different from true [2021-12-06 23:21:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:21:24,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:21:47,001 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse18 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse19 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse18) 256)) (.cse20 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18) 256))) (let ((.cse4 (<= .cse20 127)) (.cse10 (<= .cse19 127)) (.cse6 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse20) 256) 0))) (.cse8 (<= .cse20 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse9 (< 127 .cse20)) (.cse3 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse1 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse19) 256) 0))) (.cse2 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (<= .cse19 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse0 (< 127 .cse19)) (.cse7 (<= 0 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse11 (mod .cse18 256))) (and (or (and (or .cse0 (and (or .cse1 .cse2 .cse3 .cse4 .cse5) (or (and (or .cse2 .cse6 .cse7 .cse8) (or .cse1 .cse2 .cse3 .cse5)) .cse9))) (or .cse2 .cse6 .cse7 .cse10 .cse8 .cse9)) (<= .cse11 127)) (or (let ((.cse12 (= .cse18 0))) (let ((.cse15 (<= .cse11 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse16 (and (not .cse12) (< |c_ULTIMATE.start_gcd_test_~a#1| 0))) (.cse17 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse11) 256) 0)))) (let ((.cse14 (or .cse15 .cse7 .cse16 .cse17)) (.cse13 (or .cse15 .cse16 .cse17))) (and (or (and (or (and (or .cse7 (and (or .cse2 .cse6 .cse8 .cse12) .cse13)) .cse13) .cse9) (or (and .cse14 .cse13) .cse4)) .cse10) (or (and .cse14 (or (and (or .cse7 (and (or .cse2 .cse6 .cse8) .cse13)) (or .cse3 (and .cse13 (or .cse1 .cse2 .cse5)))) .cse9) (or .cse3 (and .cse13 (or .cse1 .cse2 .cse5 .cse12)))) .cse0))))) (< 127 .cse11))))))) is different from true [2021-12-06 23:22:56,286 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main1_~x~0#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0) (let ((.cse22 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse24 (mod (+ (* |c_ULTIMATE.start_gcd_test_~b#1| 255) .cse22) 256))) (let ((.cse28 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse24) 256)) (.cse26 (+ (- 256) .cse24))) (let ((.cse25 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse26) 256)) (.cse27 (mod (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse22) 256)) (.cse9 (<= 0 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse16 (= .cse24 0)) (.cse17 (not (= (mod (mod .cse24 .cse28) 256) 0))) (.cse18 (<= .cse28 |c_ULTIMATE.start_main1_~x~0#1|))) (let ((.cse4 (or .cse9 .cse16 .cse17 .cse18)) (.cse2 (< 127 .cse27)) (.cse6 (< 127 .cse24)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse3 (<= .cse27 127)) (.cse8 (not (= (mod (mod .cse26 .cse25) 256) 0))) (.cse10 (<= .cse25 |c_ULTIMATE.start_main1_~x~0#1|)) (.cse11 (<= .cse24 127)) (.cse14 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse15 (mod .cse22 256))) (and (or (let ((.cse5 (let ((.cse12 (+ (- 256) .cse15))) (let ((.cse13 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse12) 256))) (or (not (= (mod (mod .cse12 .cse13) 256) 0)) .cse14 (<= .cse13 |c_ULTIMATE.start_main1_~x~0#1|)))))) (and (or (let ((.cse1 (and .cse4 .cse5))) (and (or .cse0 .cse1 .cse2) (or .cse0 .cse3 .cse1))) .cse6) (or (let ((.cse7 (and (or .cse8 .cse9 .cse10) .cse5))) (and (or .cse7 .cse0 .cse3) (or .cse7 .cse0))) .cse11))) (<= .cse15 127)) (or (let ((.cse20 (let ((.cse23 (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse15) 256))) (or (<= .cse23 |c_ULTIMATE.start_main1_~x~0#1|) (not (= (mod (mod .cse15 .cse23) 256) 0)) .cse14 (= 0 .cse15)))) (.cse19 (= .cse22 0))) (and (or (and (or (and (or .cse9 .cse16 .cse17 .cse18 .cse19) .cse20) .cse0 .cse3) (or .cse0 (and .cse4 .cse20) .cse2)) .cse6) (or (let ((.cse21 (and .cse20 (or .cse8 .cse9 .cse10 .cse19)))) (and (or .cse0 .cse21) (or .cse0 .cse3 .cse21))) .cse11))) (< 127 .cse15))))))))) is different from true [2021-12-06 23:23:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-06 23:23:52,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:23:52,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779833265] [2021-12-06 23:23:52,880 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:23:52,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074877070] [2021-12-06 23:23:52,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074877070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:23:52,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:23:52,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-12-06 23:23:52,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187260090] [2021-12-06 23:23:52,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:23:52,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 23:23:52,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:23:52,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 23:23:52,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=220, Unknown=21, NotChecked=102, Total=420 [2021-12-06 23:23:52,882 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:22,349 WARN L227 SmtUtils]: Spent 12.69s on a formula simplification. DAG size of input: 51 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:24:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:24:22,355 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-12-06 23:24:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:24:22,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 14 [2021-12-06 23:24:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:24:22,356 INFO L225 Difference]: With dead ends: 45 [2021-12-06 23:24:22,356 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 23:24:22,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 148.8s TimeCoverageRelationStatistics Valid=80, Invalid=252, Unknown=22, NotChecked=108, Total=462 [2021-12-06 23:24:22,357 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:24:22,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 172 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 101 Unchecked, 0.0s Time] [2021-12-06 23:24:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 23:24:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-12-06 23:24:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 23:24:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-06 23:24:22,362 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 14 [2021-12-06 23:24:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:24:22,362 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-06 23:24:22,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:24:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-06 23:24:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 23:24:22,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:24:22,363 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:22,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:24:22,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:22,564 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:24:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:24:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1911673028, now seen corresponding path program 1 times [2021-12-06 23:24:22,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:24:22,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386733908] [2021-12-06 23:24:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:22,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:24:22,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:24:22,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504631276] [2021-12-06 23:24:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:24:22,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:24:22,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:24:22,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:24:22,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5064ea5-0094-4147-9adc-604cc4c74e00/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:24:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:24:22,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:24:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:24:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:24:43,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:25:28,510 WARN L227 SmtUtils]: Spent 25.42s on a formula simplification. DAG size of input: 75 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)