./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a --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 fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 --- 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-b5237d8 [2022-11-21 09:14:39,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:14:39,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:14:39,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:14:39,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:14:39,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:14:39,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:14:39,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:14:39,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:14:39,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:14:39,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:14:39,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:14:39,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:14:39,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:14:39,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:14:39,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:14:39,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:14:39,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:14:39,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:14:39,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:14:39,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:14:39,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:14:39,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:14:39,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:14:39,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:14:39,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:14:39,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:14:39,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:14:39,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:14:39,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:14:39,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:14:39,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:14:39,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:14:39,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:14:39,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:14:39,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:14:39,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:14:39,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:14:39,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:14:39,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:14:39,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:14:39,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 09:14:39,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:14:39,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:14:39,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:14:39,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:14:39,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:14:39,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:14:39,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:14:39,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:14:39,875 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:14:39,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:14:39,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:14:39,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:14:39,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:14:39,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:14:39,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 09:14:39,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:14:39,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 09:14:39,878 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:14:39,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:14:39,878 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:14:39,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 09:14:39,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:14:39,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:14:39,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:14:39,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:14:39,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:14:39,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:14:39,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 09:14:39,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:14:39,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:14:39,882 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 09:14:39,882 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 09:14:39,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 09:14:39,882 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_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 [2022-11-21 09:14:40,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:14:40,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:14:40,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:14:40,159 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:14:40,159 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:14:40,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2022-11-21 09:14:43,301 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:14:43,519 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:14:43,520 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2022-11-21 09:14:43,528 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/data/b6c4d3b25/975c30ab165e44b698f672db3cceddc7/FLAG31ce945a6 [2022-11-21 09:14:43,547 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/data/b6c4d3b25/975c30ab165e44b698f672db3cceddc7 [2022-11-21 09:14:43,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:14:43,557 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:14:43,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:14:43,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:14:43,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:14:43,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278fa607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43, skipping insertion in model container [2022-11-21 09:14:43,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:14:43,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:14:43,783 WARN L237 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_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2022-11-21 09:14:43,844 WARN L237 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_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2022-11-21 09:14:43,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:14:43,865 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:14:43,888 WARN L237 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_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2022-11-21 09:14:43,901 WARN L237 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_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2022-11-21 09:14:43,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:14:43,929 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:14:43,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43 WrapperNode [2022-11-21 09:14:43,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:14:43,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:14:43,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:14:43,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:14:43,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,969 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2022-11-21 09:14:43,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:14:43,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:14:43,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:14:43,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:14:43,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:43,999 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:44,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:44,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:14:44,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:14:44,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:14:44,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:14:44,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (1/1) ... [2022-11-21 09:14:44,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:14:44,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:14:44,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:14:44,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:14:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:14:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-21 09:14:44,091 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-21 09:14:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-21 09:14:44,091 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-21 09:14:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 09:14:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:14:44,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:14:44,171 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:14:44,173 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:14:44,408 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:14:44,414 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:14:44,415 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 09:14:44,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:14:44 BoogieIcfgContainer [2022-11-21 09:14:44,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:14:44,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:14:44,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:14:44,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:14:44,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:14:43" (1/3) ... [2022-11-21 09:14:44,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581f84d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:14:44, skipping insertion in model container [2022-11-21 09:14:44,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:14:43" (2/3) ... [2022-11-21 09:14:44,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@581f84d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:14:44, skipping insertion in model container [2022-11-21 09:14:44,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:14:44" (3/3) ... [2022-11-21 09:14:44,461 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_8.i [2022-11-21 09:14:44,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:14:44,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 09:14:44,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:14:44,585 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;@6a39913a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:14:44,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 09:14:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:14:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 09:14:44,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:14:44,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:44,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:14:44,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2022-11-21 09:14:44,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:44,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524547047] [2022-11-21 09:14:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:44,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:44,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 09:14:44,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592834233] [2022-11-21 09:14:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:44,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:14:44,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:14:44,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:14:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:44,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 09:14:44,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:14:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:14:44,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:14:44,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:14:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524547047] [2022-11-21 09:14:44,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 09:14:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592834233] [2022-11-21 09:14:44,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592834233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:14:44,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:14:44,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:14:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112865559] [2022-11-21 09:14:44,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:14:44,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:14:44,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:14:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:14:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:14:45,027 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-21 09:14:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:14:45,077 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-11-21 09:14:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:14:45,080 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2022-11-21 09:14:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:14:45,088 INFO L225 Difference]: With dead ends: 72 [2022-11-21 09:14:45,088 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 09:14:45,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:14:45,096 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:14:45,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:14:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 09:14:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-21 09:14:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:14:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-21 09:14:45,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2022-11-21 09:14:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:14:45,154 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-21 09:14:45,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-21 09:14:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-21 09:14:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 09:14:45,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:14:45,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:45,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:14:45,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:45,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:14:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2022-11-21 09:14:45,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:45,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447047783] [2022-11-21 09:14:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:45,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:45,392 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 09:14:45,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400562045] [2022-11-21 09:14:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:45,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:45,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:14:45,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:14:45,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:14:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:45,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:14:45,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:14:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:14:45,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:14:45,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:14:45,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447047783] [2022-11-21 09:14:45,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 09:14:45,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400562045] [2022-11-21 09:14:45,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400562045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:14:45,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:14:45,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:14:45,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831725641] [2022-11-21 09:14:45,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:14:45,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:14:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:14:45,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:14:45,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:14:45,638 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. 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) [2022-11-21 09:14:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:14:45,669 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-11-21 09:14:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:14:45,670 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 [2022-11-21 09:14:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:14:45,671 INFO L225 Difference]: With dead ends: 39 [2022-11-21 09:14:45,672 INFO L226 Difference]: Without dead ends: 33 [2022-11-21 09:14:45,672 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 [2022-11-21 09:14:45,678 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:14:45,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:14:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-21 09:14:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-21 09:14:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:14:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-21 09:14:45,694 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-11-21 09:14:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:14:45,694 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-21 09:14:45,698 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) [2022-11-21 09:14:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-21 09:14:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 09:14:45,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:14:45,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:45,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:14:45,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:45,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:14:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:45,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2022-11-21 09:14:45,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:45,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047946236] [2022-11-21 09:14:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:45,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:45,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 09:14:45,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129490642] [2022-11-21 09:14:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:45,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:45,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:14:45,940 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:14:45,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 09:14:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:14:46,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 09:14:46,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:14:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:14:46,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:14:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:14:46,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:14:46,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047946236] [2022-11-21 09:14:46,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 09:14:46,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129490642] [2022-11-21 09:14:46,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129490642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:14:46,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:14:46,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-21 09:14:46,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011135447] [2022-11-21 09:14:46,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:14:46,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:14:46,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:14:46,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:14:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:14:46,132 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-11-21 09:14:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:14:46,201 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-21 09:14:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 09:14:46,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 [2022-11-21 09:14:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:14:46,202 INFO L225 Difference]: With dead ends: 39 [2022-11-21 09:14:46,202 INFO L226 Difference]: Without dead ends: 34 [2022-11-21 09:14:46,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-21 09:14:46,204 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:14:46,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:14:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-21 09:14:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-21 09:14:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:14:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-21 09:14:46,215 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-11-21 09:14:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:14:46,215 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-21 09:14:46,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-11-21 09:14:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-21 09:14:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 09:14:46,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:14:46,216 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:14:46,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 09:14:46,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-21 09:14:46,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:14:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:14:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2022-11-21 09:14:46,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:14:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563308719] [2022-11-21 09:14:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:14:46,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:14:46,446 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 09:14:46,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458696353] [2022-11-21 09:14:46,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:14:46,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:14:46,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:14:46,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:14:46,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 09:14:56,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:14:56,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:14:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-21 09:14:56,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:17:10,118 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-21 09:17:31,241 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-21 09:17:53,016 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-21 09:18:11,589 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-21 09:18:13,592 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true [2022-11-21 09:18:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-21 09:18:31,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:22:46,528 WARN L233 SmtUtils]: Spent 3.17m on a formula simplification that was a NOOP. DAG size: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:24:05,771 WARN L233 SmtUtils]: Spent 50.20s on a formula simplification. DAG size of input: 67 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:25:34,033 WARN L233 SmtUtils]: Spent 30.56s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:26:21,167 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from false [2022-11-21 09:26:23,170 WARN L859 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from true [2022-11-21 09:26:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:26:42,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:26:42,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563308719] [2022-11-21 09:26:42,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 09:26:42,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458696353] [2022-11-21 09:26:42,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458696353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:26:42,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:26:42,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-21 09:26:42,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29717212] [2022-11-21 09:26:42,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:26:42,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 09:26:42,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:26:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 09:26:42,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=136, Unknown=23, NotChecked=140, Total=342 [2022-11-21 09:26:42,857 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-11-21 09:27:37,630 WARN L233 SmtUtils]: Spent 47.89s on a formula simplification. DAG size of input: 45 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:27:39,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-21 09:27:41,716 WARN L837 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (let ((.cse2 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (let ((.cse0 (<= .cse2 127))) (and (let ((.cse1 (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (not .cse0) (= 0 .cse1) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0)))) (let ((.cse3 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) 256) 0)) .cse0 (= .cse3 0)))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse6 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse5 (<= .cse6 127))) (and (let ((.cse4 (mod (+ .cse6 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse4 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse5 (= .cse4 0))) (let ((.cse7 (mod (mod .cse6 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse5) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse7) 256) 0)) (= .cse7 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|))) is different from false [2022-11-21 09:27:44,953 WARN L837 $PredicateComparison]: unable to prove that (and (or (let ((.cse12 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse13 (mod (+ .cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse1 (<= .cse13 127)) (.cse9 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse8 (mod .cse12 256))) (let ((.cse0 (<= .cse8 127)) (.cse2 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse13)) 256) 0))) (.cse5 (= .cse13 0)) (.cse6 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse13) 256) 0))) (.cse3 (not .cse9)) (.cse7 (not .cse1))) (and (or .cse0 (let ((.cse4 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse8)) 256) 0)) .cse9))) (and (or .cse1 (and (or .cse2 .cse3) .cse4)) (or (and .cse4 (or .cse5 .cse6 .cse3)) .cse7)))) (or (not .cse0) (let ((.cse11 (or .cse9 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse8) 256) 0)) (= .cse8 0))) (.cse10 (= .cse12 0))) (and (or (and (or .cse10 .cse2 .cse3) .cse11) .cse1) (or (and .cse11 (or .cse10 .cse5 .cse6 .cse3)) .cse7))))))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse14 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse14 127) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse14) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse15 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (not (<= .cse15 127)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse15) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) is different from false [2022-11-21 09:27:50,359 WARN L859 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (or (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse28 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse29 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse13 (<= .cse29 127)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse8 (not .cse18)) (.cse25 (= .cse28 0)) (.cse2 (<= .cse28 127)) (.cse17 (mod .cse27 256))) (let ((.cse19 (<= .cse17 127)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse3 (not .cse2)) (.cse15 (or .cse23 .cse8 .cse25)) (.cse6 (= .cse29 0)) (.cse7 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse10 (not .cse13)) (.cse14 (not .cse9)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0)))) (and (or (let ((.cse5 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse17)) 256) 0)) .cse18))) (let ((.cse1 (or .cse14 (and (or .cse16 .cse8) .cse5))) (.cse4 (or .cse14 (and .cse5 .cse15)))) (and (or (let ((.cse0 (or (and .cse5 (or .cse6 .cse7 .cse8)) .cse9))) (and (or (and .cse0 .cse1) .cse2) (or .cse3 (and .cse4 .cse0)))) .cse10) (or (let ((.cse11 (or .cse9 (and (or .cse12 .cse8) .cse5)))) (and (or (and .cse1 .cse11) .cse2) (or (and .cse4 .cse11) .cse3))) .cse13)))) .cse19) (or (not .cse19) (let ((.cse22 (or .cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256) 0)) (= .cse17 0))) (.cse24 (= .cse27 0))) (let ((.cse21 (or .cse14 (and .cse22 (or .cse24 .cse16 .cse8))))) (and (or (let ((.cse20 (or (and (or .cse24 .cse12 .cse8) .cse22) .cse9))) (and (or .cse2 (and .cse20 .cse21)) (or (and (or .cse14 (and .cse22 (or .cse23 .cse24 .cse8 .cse25))) .cse20) .cse3))) .cse13) (or (let ((.cse26 (or .cse9 (and .cse22 (or .cse24 .cse6 .cse7 .cse8))))) (and (or .cse3 (and (or .cse14 (and .cse22 .cse15)) .cse26)) (or (and .cse26 .cse21) .cse2))) .cse10)))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse30 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse30 127) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse30) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse31 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (not (<= .cse31 127)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (+ |c_ULTIMATE.start_gcd_test_~a#1| 256) .cse31) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))))) is different from true [2022-11-21 09:27:52,365 WARN L837 $PredicateComparison]: unable to prove that (and (or (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~b#1| 128))) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 256) 0)) (not (<= |c_ULTIMATE.start_gcd_test_~b#1| 127)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int)) (let ((.cse0 (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256))) (and (<= .cse0 127) (= (mod (mod .cse0 |c_ULTIMATE.start_gcd_test_~a#1|) 256) |c_ULTIMATE.start_gcd_test_~b#1|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) (< 0 |c_ULTIMATE.start_gcd_test_~a#1|)) is different from false [2022-11-21 09:27:54,371 WARN L837 $PredicateComparison]: unable to prove that (and (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| .cse0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))))) is different from false [2022-11-21 09:27:55,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 09:27:58,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 09:27:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:27:58,342 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-21 09:27:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 09:27:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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 [2022-11-21 09:27:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:27:58,348 INFO L225 Difference]: With dead ends: 43 [2022-11-21 09:27:58,348 INFO L226 Difference]: Without dead ends: 38 [2022-11-21 09:27:58,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 427.6s TimeCoverageRelationStatistics Valid=57, Invalid=163, Unknown=30, NotChecked=350, Total=600 [2022-11-21 09:27:58,350 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:27:58,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 404 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 2 Unknown, 72 Unchecked, 6.0s Time] [2022-11-21 09:27:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-21 09:27:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-11-21 09:27:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:27:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-21 09:27:58,359 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-21 09:27:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:27:58,359 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-21 09:27:58,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-11-21 09:27:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-21 09:27:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 09:27:58,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:27:58,361 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:27:58,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-21 09:27:58,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:27:58,569 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:27:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:27:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash 403427572, now seen corresponding path program 1 times [2022-11-21 09:27:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:27:58,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879401265] [2022-11-21 09:27:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:27:58,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:27:58,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 09:27:58,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503321549] [2022-11-21 09:27:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:27:58,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:27:58,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:27:58,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:27:58,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 09:27:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:27:58,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 09:27:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:27:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:27:59,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:28:36,181 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse16 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse28 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse29 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse5 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse9 (<= .cse29 127)) (.cse3 (<= .cse28 127)) (.cse22 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| .cse28) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|)))) (.cse24 (= .cse28 0)) (.cse25 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| .cse29) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|)))) (.cse26 (= .cse29 0)) (.cse12 (not .cse16)) (.cse17 (mod .cse27 256))) (let ((.cse18 (<= .cse17 127)) (.cse11 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| (+ (- 256) .cse29)) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|)))) (.cse6 (or .cse25 .cse26 .cse12)) (.cse14 (or .cse22 .cse12 .cse24)) (.cse0 (not .cse3)) (.cse8 (not .cse9)) (.cse13 (not .cse5)) (.cse15 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| (+ (- 256) .cse28)) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|))))) (and (or (let ((.cse7 (or .cse16 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| (+ (- 256) .cse17)) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|)))))) (let ((.cse4 (or (and .cse7 (or .cse15 .cse12)) .cse13)) (.cse2 (or .cse13 (and .cse14 .cse7)))) (and (or (let ((.cse1 (or .cse5 (and .cse6 .cse7)))) (and (or .cse0 (and .cse1 .cse2)) (or .cse3 (and .cse4 .cse1)))) .cse8) (or .cse9 (let ((.cse10 (or .cse5 (and (or .cse11 .cse12) .cse7)))) (and (or (and .cse4 .cse10) .cse3) (or .cse0 (and .cse10 .cse2)))))))) .cse18) (or (not .cse18) (let ((.cse21 (or .cse16 (forall ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (or (not (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_21| .cse17) 256) 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_21| |c_ULTIMATE.start_gcd_test_~b#1|))) (= .cse17 0))) (.cse23 (= .cse27 0))) (let ((.cse20 (or .cse13 (and .cse21 (or .cse23 .cse15 .cse12))))) (and (or (let ((.cse19 (or .cse5 (and .cse21 (or .cse23 .cse11 .cse12))))) (and (or .cse3 (and .cse19 .cse20)) (or .cse0 (and (or (and .cse21 (or .cse22 .cse23 .cse12 .cse24)) .cse13) .cse19)))) .cse9) (or (and (or (and .cse20 (or .cse5 (and (or .cse23 .cse25 .cse26 .cse12) .cse21))) .cse3) (or (and (or (and .cse6 .cse21) .cse5) (or .cse13 (and .cse21 .cse14))) .cse0)) .cse8)))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from false [2022-11-21 09:29:18,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:29:18,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879401265] [2022-11-21 09:29:18,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 09:29:18,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503321549] [2022-11-21 09:29:18,053 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-21 09:29:18,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 139 [2022-11-21 09:29:18,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-21 09:29:18,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:29:18,254 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_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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:625) 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.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) 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) ... 52 more [2022-11-21 09:29:18,258 INFO L158 Benchmark]: Toolchain (without parser) took 874700.84ms. Allocated memory is still 197.1MB. Free memory was 153.9MB in the beginning and 122.7MB in the end (delta: 31.2MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. [2022-11-21 09:29:18,258 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 138.4MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 09:29:18,259 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.80ms. Allocated memory is still 197.1MB. Free memory was 153.9MB in the beginning and 141.9MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 09:29:18,266 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.64ms. Allocated memory is still 197.1MB. Free memory was 141.9MB in the beginning and 139.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 09:29:18,266 INFO L158 Benchmark]: Boogie Preprocessor took 32.22ms. Allocated memory is still 197.1MB. Free memory was 139.3MB in the beginning and 138.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 09:29:18,266 INFO L158 Benchmark]: RCFGBuilder took 414.17ms. Allocated memory is still 197.1MB. Free memory was 138.2MB in the beginning and 125.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-21 09:29:18,267 INFO L158 Benchmark]: TraceAbstraction took 873820.75ms. Allocated memory is still 197.1MB. Free memory was 124.6MB in the beginning and 122.7MB in the end (delta: 1.8MB). Peak memory consumption was 3.0MB. Max. memory is 16.1GB. [2022-11-21 09:29:18,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 138.4MB. Free memory is still 79.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.80ms. Allocated memory is still 197.1MB. Free memory was 153.9MB in the beginning and 141.9MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.64ms. Allocated memory is still 197.1MB. Free memory was 141.9MB in the beginning and 139.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.22ms. Allocated memory is still 197.1MB. Free memory was 139.3MB in the beginning and 138.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 414.17ms. Allocated memory is still 197.1MB. Free memory was 138.2MB in the beginning and 125.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 873820.75ms. Allocated memory is still 197.1MB. Free memory was 124.6MB in the beginning and 122.7MB in the end (delta: 1.8MB). Peak memory consumption was 3.0MB. 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_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a --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 fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 --- 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-b5237d8 [2022-11-21 09:29:20,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:29:20,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:29:20,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:29:20,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:29:20,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:29:20,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:29:20,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:29:20,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:29:20,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:29:20,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:29:20,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:29:20,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:29:20,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:29:20,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:29:20,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:29:20,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:29:20,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:29:20,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:29:20,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:29:20,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:29:20,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:29:20,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:29:20,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:29:20,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:29:20,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:29:20,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:29:20,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:29:20,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:29:20,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:29:20,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:29:20,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:29:20,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:29:20,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:29:20,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:29:20,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:29:20,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:29:20,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:29:20,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:29:20,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:29:20,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:29:20,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-21 09:29:20,724 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:29:20,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:29:20,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:29:20,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:29:20,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:29:20,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:29:20,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:29:20,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:29:20,728 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:29:20,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:29:20,728 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:29:20,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:29:20,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:29:20,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 09:29:20,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:29:20,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 09:29:20,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 09:29:20,731 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 09:29:20,731 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 09:29:20,731 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:29:20,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:29:20,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:29:20,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 09:29:20,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:29:20,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:29:20,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:29:20,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:29:20,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:29:20,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:29:20,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 09:29:20,735 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 09:29:20,735 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 09:29:20,735 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 09:29:20,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 09:29:20,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 09:29:20,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 09:29:20,736 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_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 [2022-11-21 09:29:21,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:29:21,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:29:21,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:29:21,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:29:21,139 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:29:21,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2022-11-21 09:29:24,225 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:29:24,529 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:29:24,530 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2022-11-21 09:29:24,541 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/data/2fde0697c/38f5cff0f5b8400fa033fbb7121c5b46/FLAGb3c32e4a2 [2022-11-21 09:29:24,562 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/data/2fde0697c/38f5cff0f5b8400fa033fbb7121c5b46 [2022-11-21 09:29:24,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:29:24,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:29:24,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:29:24,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:29:24,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:29:24,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:24,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bec0348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24, skipping insertion in model container [2022-11-21 09:29:24,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:24,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:29:24,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:29:24,794 WARN L237 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_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2022-11-21 09:29:24,818 WARN L237 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_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2022-11-21 09:29:24,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:29:24,842 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:29:24,858 WARN L237 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_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2022-11-21 09:29:24,869 WARN L237 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_a842a8f1-ce46-489f-a65c-58151c1a7800/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2022-11-21 09:29:24,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:29:24,886 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:29:24,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24 WrapperNode [2022-11-21 09:29:24,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:29:24,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:29:24,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:29:24,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:29:24,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:24,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:24,944 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-11-21 09:29:24,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:29:24,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:29:24,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:29:24,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:29:24,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:24,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:24,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:24,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:24,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:25,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:25,008 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:25,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:25,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:29:25,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:29:25,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:29:25,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:29:25,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (1/1) ... [2022-11-21 09:29:25,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:29:25,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:29:25,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:29:25,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:29:25,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:29:25,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-21 09:29:25,129 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-21 09:29:25,129 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-21 09:29:25,129 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-21 09:29:25,129 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-21 09:29:25,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:29:25,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:29:25,241 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:29:25,243 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:29:36,530 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:29:36,549 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:29:36,550 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 09:29:36,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:29:36 BoogieIcfgContainer [2022-11-21 09:29:36,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:29:36,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:29:36,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:29:36,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:29:36,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:29:24" (1/3) ... [2022-11-21 09:29:36,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe1f9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:29:36, skipping insertion in model container [2022-11-21 09:29:36,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:29:24" (2/3) ... [2022-11-21 09:29:36,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe1f9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:29:36, skipping insertion in model container [2022-11-21 09:29:36,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:29:36" (3/3) ... [2022-11-21 09:29:36,560 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_8.i [2022-11-21 09:29:36,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:29:36,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 09:29:36,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:29:36,636 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;@3c7ba6c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:29:36,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 09:29:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:29:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 09:29:36,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:29:36,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:29:36,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:29:36,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:29:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2022-11-21 09:29:36,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:29:36,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609201937] [2022-11-21 09:29:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:29:36,670 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 [2022-11-21 09:29:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:29:36,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 09:29:36,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:29:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 09:29:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:29:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:29:36,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:29:36,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:29:36,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609201937] [2022-11-21 09:29:36,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609201937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:29:36,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:29:36,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:29:36,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257806752] [2022-11-21 09:29:36,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:29:36,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:29:36,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:29:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:29:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:29:36,827 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-21 09:29:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:29:36,846 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-11-21 09:29:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:29:36,848 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2022-11-21 09:29:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:29:36,856 INFO L225 Difference]: With dead ends: 72 [2022-11-21 09:29:36,856 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 09:29:36,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:29:36,863 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:29:36,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:29:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 09:29:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-21 09:29:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:29:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-21 09:29:36,905 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2022-11-21 09:29:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:29:36,906 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-21 09:29:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2022-11-21 09:29:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-21 09:29:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 09:29:36,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:29:36,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:29:36,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:37,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:37,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:29:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:29:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2022-11-21 09:29:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:29:37,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733120023] [2022-11-21 09:29:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:29:37,146 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 [2022-11-21 09:29:37,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:29:37,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 09:29:37,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:29:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:29:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:29:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:29:37,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:29:37,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:29:37,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733120023] [2022-11-21 09:29:37,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733120023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:29:37,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:29:37,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:29:37,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984532581] [2022-11-21 09:29:37,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:29:37,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:29:37,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:29:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:29:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:29:37,342 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. 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) [2022-11-21 09:29:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:29:37,412 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-11-21 09:29:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:29:37,413 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 [2022-11-21 09:29:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:29:37,414 INFO L225 Difference]: With dead ends: 39 [2022-11-21 09:29:37,415 INFO L226 Difference]: Without dead ends: 33 [2022-11-21 09:29:37,416 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 [2022-11-21 09:29:37,418 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:29:37,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:29:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-21 09:29:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-21 09:29:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:29:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-21 09:29:37,432 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-11-21 09:29:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:29:37,432 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-21 09:29:37,433 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) [2022-11-21 09:29:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-21 09:29:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 09:29:37,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:29:37,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:29:37,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:37,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:37,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:29:37,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:29:37,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2022-11-21 09:29:37,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:29:37,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481600068] [2022-11-21 09:29:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:29:37,641 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 [2022-11-21 09:29:37,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:29:37,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 09:29:37,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:29:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 09:29:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:29:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:29:38,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:29:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:29:38,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:29:38,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481600068] [2022-11-21 09:29:38,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481600068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:29:38,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:29:38,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-21 09:29:38,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280734344] [2022-11-21 09:29:38,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:29:38,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 09:29:38,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:29:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 09:29:38,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:29:38,308 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-11-21 09:29:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:29:38,809 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-21 09:29:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 09:29:38,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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 [2022-11-21 09:29:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:29:38,811 INFO L225 Difference]: With dead ends: 39 [2022-11-21 09:29:38,811 INFO L226 Difference]: Without dead ends: 34 [2022-11-21 09:29:38,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-21 09:29:38,814 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 09:29:38,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 09:29:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-21 09:29:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-21 09:29:38,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 09:29:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-21 09:29:38,822 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-11-21 09:29:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:29:38,823 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-21 09:29:38,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-11-21 09:29:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-21 09:29:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 09:29:38,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:29:38,825 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:29:38,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:39,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:39,040 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:29:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:29:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2022-11-21 09:29:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 09:29:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299722758] [2022-11-21 09:29:39,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:29:39,042 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 [2022-11-21 09:29:39,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 09:29:39,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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) [2022-11-21 09:29:39,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a842a8f1-ce46-489f-a65c-58151c1a7800/bin/uautomizer-vX5HgA9Q3a/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 [2022-11-21 09:29:40,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:29:40,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:29:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 09:29:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:29:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:29:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:29:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:29:55,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 09:29:55,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299722758] [2022-11-21 09:29:55,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299722758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:29:55,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:29:55,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2022-11-21 09:29:55,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225751261] [2022-11-21 09:29:55,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 09:29:55,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 09:29:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 09:29:55,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 09:29:55,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2022-11-21 09:29:55,314 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:29:57,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-21 09:29:59,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-21 09:30:01,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-21 09:30:03,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []