./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_2+newton_2_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_2_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro --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 add45819e4621ede17512a8acbf89201f3f4db1ab1bf97afdd66c20e4064e4cd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:25:33,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:25:33,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:25:33,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:25:33,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:25:33,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:25:33,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:25:33,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:25:33,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:25:33,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:25:33,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:25:33,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:25:33,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:25:33,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:25:33,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:25:33,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:25:33,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:25:33,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:25:33,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:25:33,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:25:33,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:25:33,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:25:33,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:25:33,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:25:33,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:25:33,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:25:33,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:25:33,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:25:33,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:25:33,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:25:33,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:25:33,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:25:33,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:25:33,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:25:33,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:25:33,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:25:33,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:25:33,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:25:33,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:25:33,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:25:33,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:25:33,892 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:25:33,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:25:33,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:25:33,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:25:33,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:25:33,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:25:33,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:25:33,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:25:33,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:25:33,926 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:25:33,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:25:33,927 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:25:33,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:25:33,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:25:33,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:25:33,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:25:33,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:25:33,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:25:33,929 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:25:33,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:25:33,929 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:25:33,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:25:33,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:25:33,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:25:33,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:25:33,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:25:33,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:25:33,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:25:33,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:25:33,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:25:33,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:25:33,933 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:25:33,933 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:25:33,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:25:33,933 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> add45819e4621ede17512a8acbf89201f3f4db1ab1bf97afdd66c20e4064e4cd [2022-11-18 18:25:34,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:25:34,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:25:34,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:25:34,301 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:25:34,302 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:25:34,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/combinations/gcd_2+newton_2_4.i [2022-11-18 18:25:34,375 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data/2035c432d/e129af9fe2764790b5606e8b2531b691/FLAG04c55cd3d [2022-11-18 18:25:34,935 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:25:34,941 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i [2022-11-18 18:25:34,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data/2035c432d/e129af9fe2764790b5606e8b2531b691/FLAG04c55cd3d [2022-11-18 18:25:35,307 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data/2035c432d/e129af9fe2764790b5606e8b2531b691 [2022-11-18 18:25:35,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:25:35,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:25:35,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:25:35,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:25:35,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:25:35,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41593183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35, skipping insertion in model container [2022-11-18 18:25:35,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:25:35,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:25:35,547 WARN L234 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[1226,1239] [2022-11-18 18:25:35,572 WARN L234 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[2841,2854] [2022-11-18 18:25:35,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:25:35,582 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:25:35,596 WARN L234 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[1226,1239] [2022-11-18 18:25:35,608 WARN L234 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[2841,2854] [2022-11-18 18:25:35,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:25:35,623 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:25:35,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35 WrapperNode [2022-11-18 18:25:35,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:25:35,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:25:35,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:25:35,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:25:35,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,662 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-11-18 18:25:35,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:25:35,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:25:35,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:25:35,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:25:35,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:25:35,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:25:35,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:25:35,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:25:35,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (1/1) ... [2022-11-18 18:25:35,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:25:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:25:35,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:25:35,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:25:35,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:25:35,771 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-18 18:25:35,771 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-18 18:25:35,771 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-18 18:25:35,771 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-18 18:25:35,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:25:35,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:25:35,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:25:35,847 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:25:35,850 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:25:36,068 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:25:36,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:25:36,074 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 18:25:36,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:25:36 BoogieIcfgContainer [2022-11-18 18:25:36,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:25:36,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:25:36,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:25:36,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:25:36,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:25:35" (1/3) ... [2022-11-18 18:25:36,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f13116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:25:36, skipping insertion in model container [2022-11-18 18:25:36,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:25:35" (2/3) ... [2022-11-18 18:25:36,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f13116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:25:36, skipping insertion in model container [2022-11-18 18:25:36,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:25:36" (3/3) ... [2022-11-18 18:25:36,102 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_4.i [2022-11-18 18:25:36,159 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:25:36,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:25:36,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:25:36,257 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@729a31cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:25:36,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:25:36,262 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) [2022-11-18 18:25:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:25:36,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:36,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:36,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:36,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-11-18 18:25:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:36,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292317940] [2022-11-18 18:25:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:36,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:25:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:25:36,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:25:36,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292317940] [2022-11-18 18:25:36,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292317940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:25:36,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:25:36,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:25:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081397388] [2022-11-18 18:25:36,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:25:36,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:25:36,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:25:36,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:25:36,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:25:36,680 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) [2022-11-18 18:25:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:25:36,764 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-11-18 18:25:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:25:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:25:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:25:36,776 INFO L225 Difference]: With dead ends: 90 [2022-11-18 18:25:36,777 INFO L226 Difference]: Without dead ends: 36 [2022-11-18 18:25:36,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:25:36,791 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:25:36,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 107 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:25:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-18 18:25:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-11-18 18:25:36,842 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) [2022-11-18 18:25:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-18 18:25:36,847 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 11 [2022-11-18 18:25:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:25:36,848 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-18 18:25:36,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:25:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-18 18:25:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:25:36,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:36,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:36,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:25:36,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-11-18 18:25:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944734525] [2022-11-18 18:25:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:36,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:25:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:25:37,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:25:37,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944734525] [2022-11-18 18:25:37,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944734525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:25:37,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:25:37,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:25:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180621702] [2022-11-18 18:25:37,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:25:37,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:25:37,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:25:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:25:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:25:37,023 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:25:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:25:37,068 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-18 18:25:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:25:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:25:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:25:37,070 INFO L225 Difference]: With dead ends: 36 [2022-11-18 18:25:37,071 INFO L226 Difference]: Without dead ends: 30 [2022-11-18 18:25:37,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:25:37,074 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:25:37,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:25:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-18 18:25:37,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-18 18:25:37,087 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) [2022-11-18 18:25:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-18 18:25:37,092 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-18 18:25:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:25:37,095 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-18 18:25:37,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:25:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-18 18:25:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:25:37,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:37,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:37,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:25:37,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2022-11-18 18:25:37,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:37,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630093562] [2022-11-18 18:25:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:37,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:37,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:25:37,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134290005] [2022-11-18 18:25:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:37,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:25:37,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:25:37,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:25:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:25:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:25:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:25:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:25:37,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:25:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:25:37,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:25:37,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630093562] [2022-11-18 18:25:37,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:25:37,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134290005] [2022-11-18 18:25:37,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134290005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:25:37,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:25:37,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-11-18 18:25:37,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364558436] [2022-11-18 18:25:37,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:25:37,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:25:37,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:25:37,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:25:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:25:37,423 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2022-11-18 18:25:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:25:37,508 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-18 18:25:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:25:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) Word has length 12 [2022-11-18 18:25:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:25:37,510 INFO L225 Difference]: With dead ends: 37 [2022-11-18 18:25:37,510 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 18:25:37,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 18:25:37,512 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:25:37,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:25:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 18:25:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-18 18:25:37,517 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) [2022-11-18 18:25:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-18 18:25:37,518 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 12 [2022-11-18 18:25:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:25:37,518 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-18 18:25:37,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2022-11-18 18:25:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-18 18:25:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 18:25:37,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:25:37,520 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:25:37,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:25:37,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:37,726 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:25:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:25:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1659957129, now seen corresponding path program 2 times [2022-11-18 18:25:37,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:25:37,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793166553] [2022-11-18 18:25:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:25:37,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:25:37,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:25:37,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134398385] [2022-11-18 18:25:37,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:25:37,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:25:37,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:25:37,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:25:37,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:25:37,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:25:37,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:25:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:25:37,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:25:51,675 WARN L233 SmtUtils]: Spent 12.80s on a formula simplification. DAG size of input: 72 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:25:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:25:54,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:28:04,461 WARN L233 SmtUtils]: Spent 1.98m on a formula simplification. DAG size of input: 129 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:28:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:28:05,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:28:05,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793166553] [2022-11-18 18:28:05,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:28:05,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134398385] [2022-11-18 18:28:05,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134398385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:28:05,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:28:05,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-18 18:28:05,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168564775] [2022-11-18 18:28:05,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:28:05,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 18:28:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:28:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 18:28:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:28:05,862 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2022-11-18 18:28:15,194 WARN L233 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 55 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:28:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:28:15,215 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-11-18 18:28:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:28:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 [2022-11-18 18:28:15,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:28:15,217 INFO L225 Difference]: With dead ends: 38 [2022-11-18 18:28:15,217 INFO L226 Difference]: Without dead ends: 32 [2022-11-18 18:28:15,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 145.8s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-18 18:28:15,218 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:28:15,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 258 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-11-18 18:28:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-18 18:28:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-18 18:28:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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) [2022-11-18 18:28:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-18 18:28:15,225 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 13 [2022-11-18 18:28:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:28:15,225 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-18 18:28:15,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2022-11-18 18:28:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-18 18:28:15,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 18:28:15,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:28:15,227 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:28:15,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:28:15,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:15,428 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:28:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:28:15,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1682229690, now seen corresponding path program 3 times [2022-11-18 18:28:15,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:28:15,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974231118] [2022-11-18 18:28:15,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:28:15,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:28:15,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:28:15,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735663691] [2022-11-18 18:28:15,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:28:15,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:28:15,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:28:15,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:28:15,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:28:15,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:28:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:28:15,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 18:28:15,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:28:34,597 WARN L233 SmtUtils]: Spent 11.14s on a formula simplification. DAG size of input: 55 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:29:13,949 WARN L233 SmtUtils]: Spent 24.28s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:29:39,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 139 [2022-11-18 18:29:39,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:29:39,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974231118] [2022-11-18 18:29:39,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:29:39,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735663691] [2022-11-18 18:29:39,960 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-18 18:29:39,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 18:29:40,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:29:40,161 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:306) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 51 more [2022-11-18 18:29:40,170 INFO L158 Benchmark]: Toolchain (without parser) took 244855.81ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 108.6MB in the beginning and 79.6MB in the end (delta: 29.0MB). Peak memory consumption was 57.3MB. Max. memory is 16.1GB. [2022-11-18 18:29:40,170 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 42.9MB in the beginning and 42.8MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:29:40,170 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.49ms. Allocated memory is still 140.5MB. Free memory was 108.3MB in the beginning and 113.9MB in the end (delta: -5.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 18:29:40,171 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.04ms. Allocated memory is still 140.5MB. Free memory was 113.9MB in the beginning and 111.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 18:29:40,171 INFO L158 Benchmark]: Boogie Preprocessor took 26.48ms. Allocated memory is still 140.5MB. Free memory was 111.9MB in the beginning and 110.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 18:29:40,171 INFO L158 Benchmark]: RCFGBuilder took 386.52ms. Allocated memory is still 140.5MB. Free memory was 110.7MB in the beginning and 98.5MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 18:29:40,172 INFO L158 Benchmark]: TraceAbstraction took 244073.89ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 97.7MB in the beginning and 79.6MB in the end (delta: 18.0MB). Peak memory consumption was 47.8MB. Max. memory is 16.1GB. [2022-11-18 18:29:40,174 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 42.9MB in the beginning and 42.8MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.49ms. Allocated memory is still 140.5MB. Free memory was 108.3MB in the beginning and 113.9MB in the end (delta: -5.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.04ms. Allocated memory is still 140.5MB. Free memory was 113.9MB in the beginning and 111.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.48ms. Allocated memory is still 140.5MB. Free memory was 111.9MB in the beginning and 110.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 386.52ms. Allocated memory is still 140.5MB. Free memory was 110.7MB in the beginning and 98.5MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 244073.89ms. Allocated memory was 140.5MB in the beginning and 169.9MB in the end (delta: 29.4MB). Free memory was 97.7MB in the beginning and 79.6MB in the end (delta: 18.0MB). Peak memory consumption was 47.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_2+newton_2_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro --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 add45819e4621ede17512a8acbf89201f3f4db1ab1bf97afdd66c20e4064e4cd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:29:42,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:29:42,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:29:42,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:29:42,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:29:42,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:29:42,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:29:42,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:29:42,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:29:42,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:29:42,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:29:42,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:29:42,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:29:42,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:29:42,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:29:42,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:29:42,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:29:42,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:29:42,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:29:42,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:29:42,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:29:42,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:29:42,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:29:42,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:29:42,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:29:42,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:29:42,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:29:42,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:29:42,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:29:42,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:29:42,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:29:42,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:29:42,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:29:42,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:29:42,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:29:42,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:29:42,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:29:42,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:29:42,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:29:42,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:29:42,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:29:42,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-18 18:29:42,463 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:29:42,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:29:42,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:29:42,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:29:42,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:29:42,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:29:42,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:29:42,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:29:42,469 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:29:42,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:29:42,471 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:29:42,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:29:42,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:29:42,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:29:42,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:29:42,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:29:42,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:29:42,473 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 18:29:42,473 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 18:29:42,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:29:42,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:29:42,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:29:42,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:29:42,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:29:42,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:29:42,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:29:42,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:29:42,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:29:42,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:29:42,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:29:42,477 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 18:29:42,477 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 18:29:42,478 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:29:42,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:29:42,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:29:42,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 18:29:42,479 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> add45819e4621ede17512a8acbf89201f3f4db1ab1bf97afdd66c20e4064e4cd [2022-11-18 18:29:42,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:29:42,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:29:42,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:29:42,908 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:29:42,909 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:29:42,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/combinations/gcd_2+newton_2_4.i [2022-11-18 18:29:42,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data/07663acfd/28b115fc4fdd463eb1060f3f83edace4/FLAG2e9db1907 [2022-11-18 18:29:43,520 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:29:43,525 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i [2022-11-18 18:29:43,533 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data/07663acfd/28b115fc4fdd463eb1060f3f83edace4/FLAG2e9db1907 [2022-11-18 18:29:43,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/data/07663acfd/28b115fc4fdd463eb1060f3f83edace4 [2022-11-18 18:29:43,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:29:43,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:29:43,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:29:43,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:29:43,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:29:43,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:29:43" (1/1) ... [2022-11-18 18:29:43,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7c4be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:43, skipping insertion in model container [2022-11-18 18:29:43,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:29:43" (1/1) ... [2022-11-18 18:29:43,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:29:43,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:29:44,157 WARN L234 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[1226,1239] [2022-11-18 18:29:44,207 WARN L234 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[2841,2854] [2022-11-18 18:29:44,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:29:44,260 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:29:44,284 WARN L234 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[1226,1239] [2022-11-18 18:29:44,296 WARN L234 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_4e998082-1fb9-49df-9ebf-d221fc582a4d/sv-benchmarks/c/combinations/gcd_2+newton_2_4.i[2841,2854] [2022-11-18 18:29:44,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:29:44,317 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:29:44,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44 WrapperNode [2022-11-18 18:29:44,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:29:44,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:29:44,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:29:44,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:29:44,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,381 INFO L138 Inliner]: procedures = 28, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 80 [2022-11-18 18:29:44,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:29:44,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:29:44,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:29:44,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:29:44,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,433 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:29:44,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:29:44,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:29:44,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:29:44,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (1/1) ... [2022-11-18 18:29:44,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:29:44,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:29:44,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:29:44,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:29:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:29:44,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 18:29:44,539 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-18 18:29:44,539 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-18 18:29:44,540 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-18 18:29:44,540 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-18 18:29:44,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:29:44,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:29:44,647 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:29:44,648 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:29:52,264 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:29:52,271 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:29:52,272 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 18:29:52,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:29:52 BoogieIcfgContainer [2022-11-18 18:29:52,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:29:52,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:29:52,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:29:52,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:29:52,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:29:43" (1/3) ... [2022-11-18 18:29:52,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be69c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:29:52, skipping insertion in model container [2022-11-18 18:29:52,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:29:44" (2/3) ... [2022-11-18 18:29:52,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be69c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:29:52, skipping insertion in model container [2022-11-18 18:29:52,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:29:52" (3/3) ... [2022-11-18 18:29:52,297 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_2+newton_2_4.i [2022-11-18 18:29:52,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:29:52,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:29:52,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:29:52,373 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@28455a85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:29:52,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 18:29:52,378 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) [2022-11-18 18:29:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:29:52,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:52,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:52,387 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-11-18 18:29:52,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:29:52,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210440486] [2022-11-18 18:29:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:52,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:52,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:29:52,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:29:52,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 18:29:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:29:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:52,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:52,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:29:52,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210440486] [2022-11-18 18:29:52,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210440486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:52,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:52,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:29:52,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327724489] [2022-11-18 18:29:52,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:52,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:29:52,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:29:52,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:29:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:52,672 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:52,722 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-11-18 18:29:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:29:52,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:29:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:52,730 INFO L225 Difference]: With dead ends: 68 [2022-11-18 18:29:52,731 INFO L226 Difference]: Without dead ends: 30 [2022-11-18 18:29:52,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:29:52,737 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:52,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-11-18 18:29:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-18 18:29:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-18 18:29:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 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) [2022-11-18 18:29:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-18 18:29:52,771 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2022-11-18 18:29:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:52,771 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-18 18:29:52,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-18 18:29:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 18:29:52,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:52,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:52,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:52,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:52,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:52,977 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-11-18 18:29:52,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:29:52,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168110518] [2022-11-18 18:29:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:52,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:29:52,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:29:52,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 18:29:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:53,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:29:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:53,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:53,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:29:53,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168110518] [2022-11-18 18:29:53,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168110518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:53,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:53,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:29:53,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081888168] [2022-11-18 18:29:53,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:53,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:29:53,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:29:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:29:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:29:53,205 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:53,388 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-18 18:29:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:53,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 18:29:53,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:53,389 INFO L225 Difference]: With dead ends: 37 [2022-11-18 18:29:53,390 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 18:29:53,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:29:53,391 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:53,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:29:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 18:29:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-18 18:29:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 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) [2022-11-18 18:29:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-18 18:29:53,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2022-11-18 18:29:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:53,400 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-18 18:29:53,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-18 18:29:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:29:53,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:53,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:53,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:53,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash 149955676, now seen corresponding path program 1 times [2022-11-18 18:29:53,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:29:53,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476187298] [2022-11-18 18:29:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:53,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:53,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:29:53,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:29:53,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 18:29:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:29:53,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 18:29:53,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:29:53,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:29:53,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476187298] [2022-11-18 18:29:53,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476187298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:29:53,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:29:53,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:29:53,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268806150] [2022-11-18 18:29:53,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:29:53,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:29:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:29:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:29:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:29:53,828 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:53,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:53,949 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-18 18:29:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:29:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 18:29:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:53,952 INFO L225 Difference]: With dead ends: 38 [2022-11-18 18:29:53,952 INFO L226 Difference]: Without dead ends: 30 [2022-11-18 18:29:53,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:29:53,953 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:53,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:29:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-18 18:29:53,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-18 18:29:53,960 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) [2022-11-18 18:29:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-18 18:29:53,961 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 12 [2022-11-18 18:29:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:53,962 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-18 18:29:53,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:29:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-18 18:29:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 18:29:53,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:53,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:53,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-18 18:29:54,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:54,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -659390950, now seen corresponding path program 1 times [2022-11-18 18:29:54,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:29:54,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174107617] [2022-11-18 18:29:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:29:54,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:54,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:29:54,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:29:54,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 18:29:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:29:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 18:29:54,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:29:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:54,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:29:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:29:55,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:29:55,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174107617] [2022-11-18 18:29:55,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174107617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:29:55,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:29:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-18 18:29:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330526904] [2022-11-18 18:29:55,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:29:55,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 18:29:55,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:29:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 18:29:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-18 18:29:55,590 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2022-11-18 18:29:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:29:58,869 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-11-18 18:29:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 18:29:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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 [2022-11-18 18:29:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:29:58,872 INFO L225 Difference]: With dead ends: 47 [2022-11-18 18:29:58,872 INFO L226 Difference]: Without dead ends: 33 [2022-11-18 18:29:58,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-11-18 18:29:58,874 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:29:58,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 224 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 18:29:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-18 18:29:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-18 18:29:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 18:29:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-18 18:29:58,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 12 [2022-11-18 18:29:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:29:58,882 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-18 18:29:58,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2022-11-18 18:29:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-18 18:29:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:29:58,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:29:58,884 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:29:58,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:29:59,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:59,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:29:59,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:29:59,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2084161321, now seen corresponding path program 2 times [2022-11-18 18:29:59,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:29:59,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287341431] [2022-11-18 18:29:59,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:29:59,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:29:59,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:29:59,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:29:59,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 18:30:05,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:30:05,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:30:05,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 18:30:05,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:30:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:30:50,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:47,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 18:33:47,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287341431] [2022-11-18 18:33:47,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287341431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:33:47,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 18:33:47,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-18 18:33:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307832569] [2022-11-18 18:33:47,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 18:33:47,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 18:33:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 18:33:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 18:33:47,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=428, Unknown=48, NotChecked=0, Total=552 [2022-11-18 18:33:47,598 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:50,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:33:58,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:34:31,989 WARN L233 SmtUtils]: Spent 21.46s on a formula simplification. DAG size of input: 59 DAG size of output: 14 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:34:33,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:35:55,686 WARN L233 SmtUtils]: Spent 37.31s on a formula simplification. DAG size of input: 48 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:36:22,592 WARN L233 SmtUtils]: Spent 11.46s on a formula simplification. DAG size of input: 36 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:36:48,614 WARN L233 SmtUtils]: Spent 11.83s on a formula simplification. DAG size of input: 36 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:37:16,001 WARN L233 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 36 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:37:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:37:16,015 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-18 18:37:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:37:16,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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 15 [2022-11-18 18:37:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:37:16,017 INFO L225 Difference]: With dead ends: 50 [2022-11-18 18:37:16,017 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 18:37:16,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 390.1s TimeCoverageRelationStatistics Valid=137, Invalid=787, Unknown=68, NotChecked=0, Total=992 [2022-11-18 18:37:16,019 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:37:16,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 381 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3 Invalid, 2 Unknown, 27 Unchecked, 6.6s Time] [2022-11-18 18:37:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 18:37:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-11-18 18:37:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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) [2022-11-18 18:37:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-18 18:37:16,029 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 15 [2022-11-18 18:37:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:37:16,029 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-18 18:37:16,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-18 18:37:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 18:37:16,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:37:16,031 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:16,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-18 18:37:16,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:37:16,247 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:37:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1825995883, now seen corresponding path program 1 times [2022-11-18 18:37:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 18:37:16,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764732784] [2022-11-18 18:37:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:16,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 18:37:16,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 18:37:16,250 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 18:37:16,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e998082-1fb9-49df-9ebf-d221fc582a4d/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 18:37:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:20,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 18:37:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:23,003 WARN L233 SmtUtils]: Spent 9.90s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 18:38:35,390 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_24| (_ BitVec 8)) (|ULTIMATE.start_main1_~y~0#1| (_ BitVec 8))) (let ((.cse0 ((_ sign_extend 24) |ULTIMATE.start_main1_~y~0#1|)) (.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_24|))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse3))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse2))))) (and (bvsgt .cse0 (_ bv0 32)) (not (bvsge .cse0 .cse1)) (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse1))) (_ bv0 32))))))) is different from false [2022-11-18 18:38:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:36,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:40:47,732 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_7| (_ BitVec 8)) (|v_ULTIMATE.start_gcd_test_~b#1_29| (_ BitVec 8))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main1_~y~0#1_7|)) (.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~b#1_29|))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse3))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse2))))) (or (bvsge .cse0 .cse1) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse1))) (_ bv0 32))) (not (bvsgt .cse0 (_ bv0 32)))))))) is different from false [2022-11-18 18:40:49,755 WARN L859 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_7| (_ BitVec 8)) (|v_ULTIMATE.start_gcd_test_~b#1_29| (_ BitVec 8))) (let ((.cse0 ((_ sign_extend 24) |v_ULTIMATE.start_main1_~y~0#1_7|)) (.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~b#1_29|))) (let ((.cse2 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse3))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse2))))) (or (bvsge .cse0 .cse1) (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse1))) (_ bv0 32))) (not (bvsgt .cse0 (_ bv0 32)))))))) is different from true