./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 679f2fe8d678884423b2dff47bf2c3c7ede0374b3a8bb68f9a9e8a332d8776ef --- 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-2329fc7 [2022-12-14 09:50:36,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:50:36,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:50:36,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:50:36,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:50:36,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:50:36,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:50:36,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:50:36,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:50:36,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:50:36,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:50:36,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:50:36,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:50:36,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:50:36,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:50:36,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:50:36,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:50:36,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:50:36,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:50:36,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:50:36,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:50:36,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:50:36,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:50:36,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:50:36,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:50:36,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:50:36,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:50:36,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:50:36,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:50:36,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:50:36,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:50:36,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:50:36,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:50:36,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:50:36,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:50:36,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:50:36,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:50:36,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:50:36,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:50:36,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:50:36,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:50:36,665 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:50:36,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:50:36,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:50:36,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:50:36,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:50:36,685 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:50:36,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:50:36,685 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:50:36,686 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:50:36,686 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:50:36,686 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:50:36,686 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:50:36,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:50:36,686 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:50:36,686 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:50:36,687 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:50:36,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:50:36,687 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:50:36,687 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:50:36,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:50:36,688 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:50:36,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:50:36,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:50:36,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:50:36,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:50:36,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:50:36,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:50:36,689 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:50:36,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:50:36,689 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:50:36,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:50:36,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:50:36,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:50:36,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:50:36,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:50:36,690 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:50:36,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:50:36,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:50:36,691 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:50:36,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:50:36,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:50:36,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:50:36,691 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_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 679f2fe8d678884423b2dff47bf2c3c7ede0374b3a8bb68f9a9e8a332d8776ef [2022-12-14 09:50:36,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:50:36,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:50:36,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:50:36,919 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:50:36,920 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:50:36,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/bitvector/gcd_4.c [2022-12-14 09:50:39,533 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:50:39,767 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:50:39,767 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/sv-benchmarks/c/bitvector/gcd_4.c [2022-12-14 09:50:39,773 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/data/a9f08804d/1ed398dbf3424fdfb560dd975eef381a/FLAG11cc453f5 [2022-12-14 09:50:39,785 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/data/a9f08804d/1ed398dbf3424fdfb560dd975eef381a [2022-12-14 09:50:39,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:50:39,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:50:39,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:50:39,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:50:39,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:50:39,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd731e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39, skipping insertion in model container [2022-12-14 09:50:39,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:50:39,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:50:39,914 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_d16570ab-91de-4df3-afc7-11bce58c5383/sv-benchmarks/c/bitvector/gcd_4.c[662,675] [2022-12-14 09:50:39,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:50:39,931 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:50:39,940 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_d16570ab-91de-4df3-afc7-11bce58c5383/sv-benchmarks/c/bitvector/gcd_4.c[662,675] [2022-12-14 09:50:39,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:50:39,953 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:50:39,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39 WrapperNode [2022-12-14 09:50:39,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:50:39,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:50:39,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:50:39,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:50:39,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,977 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2022-12-14 09:50:39,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:50:39,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:50:39,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:50:39,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:50:39,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,990 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:50:39,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:50:39,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:50:39,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:50:39,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (1/1) ... [2022-12-14 09:50:39,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:50:40,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:50:40,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:50:40,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:50:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:50:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:50:40,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:50:40,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:50:40,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 09:50:40,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 09:50:40,105 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:50:40,107 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:50:40,211 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:50:40,241 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:50:40,241 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:50:40,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:50:40 BoogieIcfgContainer [2022-12-14 09:50:40,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:50:40,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:50:40,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:50:40,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:50:40,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:50:39" (1/3) ... [2022-12-14 09:50:40,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a12efd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:50:40, skipping insertion in model container [2022-12-14 09:50:40,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:50:39" (2/3) ... [2022-12-14 09:50:40,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a12efd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:50:40, skipping insertion in model container [2022-12-14 09:50:40,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:50:40" (3/3) ... [2022-12-14 09:50:40,252 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2022-12-14 09:50:40,266 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:50:40,266 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:50:40,302 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:50:40,307 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=FINITE_AUTOMATA, 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;@786655d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:50:40,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:50:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:50:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:50:40,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:40,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:50:40,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:40,321 INFO L85 PathProgramCache]: Analyzing trace with hash 111551512, now seen corresponding path program 1 times [2022-12-14 09:50:40,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:40,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11761027] [2022-12-14 09:50:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:40,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:40,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:50:40,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532981654] [2022-12-14 09:50:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:40,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:40,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:50:40,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:50:40,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:50:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:50:40,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:50:40,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:50:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:40,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:50:40,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:50:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11761027] [2022-12-14 09:50:40,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:50:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532981654] [2022-12-14 09:50:40,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532981654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:50:40,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:50:40,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:50:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670475288] [2022-12-14 09:50:40,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:50:40,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:50:40,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:50:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:50:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:50:40,556 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:50:40,588 INFO L93 Difference]: Finished difference Result 34 states and 49 transitions. [2022-12-14 09:50:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:50:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:50:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:50:40,598 INFO L225 Difference]: With dead ends: 34 [2022-12-14 09:50:40,599 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 09:50:40,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:50:40,604 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:50:40,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:50:40,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 09:50:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-12-14 09:50:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:50:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 09:50:40,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-12-14 09:50:40,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:50:40,639 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 09:50:40,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 09:50:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 09:50:40,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:40,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:50:40,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:50:40,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 09:50:40,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:40,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1751160227, now seen corresponding path program 1 times [2022-12-14 09:50:40,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:40,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852911961] [2022-12-14 09:50:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:50:40,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:50:40,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852911961] [2022-12-14 09:50:40,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 09:50:40,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502681552] [2022-12-14 09:50:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:40,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:40,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:50:40,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:50:40,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:50:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:50:41,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:50:41,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:50:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:41,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:50:41,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502681552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:50:41,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:50:41,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:50:41,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787478498] [2022-12-14 09:50:41,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:50:41,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:50:41,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:50:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:50:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:50:41,124 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:50:41,142 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-12-14 09:50:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:50:41,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 09:50:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:50:41,143 INFO L225 Difference]: With dead ends: 24 [2022-12-14 09:50:41,143 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 09:50:41,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:50:41,145 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:50:41,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:50:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 09:50:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 09:50:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:50:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-14 09:50:41,151 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-12-14 09:50:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:50:41,152 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-14 09:50:41,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-14 09:50:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:50:41,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:41,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:50:41,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:50:41,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 09:50:41,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:41,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1480537094, now seen corresponding path program 1 times [2022-12-14 09:50:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:41,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915885606] [2022-12-14 09:50:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:41,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:41,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:50:41,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293732494] [2022-12-14 09:50:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:41,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:41,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:50:41,417 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:50:41,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:50:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:50:41,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:50:41,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:50:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:41,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:50:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:41,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:50:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915885606] [2022-12-14 09:50:41,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:50:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293732494] [2022-12-14 09:50:41,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293732494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:50:41,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614815906] [2022-12-14 09:50:41,552 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:50:41,552 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:50:41,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:50:41,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:50:41,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:50:41,865 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 09:50:41,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:50:42,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '246#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:50:42,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:50:42,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:50:42,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-12-14 09:50:42,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981439739] [2022-12-14 09:50:42,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:50:42,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:50:42,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:50:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:50:42,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:50:42,173 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:50:42,208 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-12-14 09:50:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:50:42,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:50:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:50:42,209 INFO L225 Difference]: With dead ends: 26 [2022-12-14 09:50:42,209 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 09:50:42,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:50:42,211 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:50:42,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:50:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 09:50:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 09:50:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:50:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-12-14 09:50:42,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-12-14 09:50:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:50:42,216 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-12-14 09:50:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-12-14 09:50:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 09:50:42,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:42,217 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:50:42,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:50:42,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:42,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1016290586, now seen corresponding path program 2 times [2022-12-14 09:50:42,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:42,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146733034] [2022-12-14 09:50:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:42,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:42,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:50:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693060810] [2022-12-14 09:50:42,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:50:42,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:50:42,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:50:42,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:50:42,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:50:42,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:50:42,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:50:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:50:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:42,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:50:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:42,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:50:42,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146733034] [2022-12-14 09:50:42,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:50:42,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693060810] [2022-12-14 09:50:42,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693060810] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:50:42,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241269345] [2022-12-14 09:50:42,790 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:50:42,790 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:50:42,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:50:42,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:50:42,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:50:42,950 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 09:50:42,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:50:43,246 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '390#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:50:43,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:50:43,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:50:43,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-14 09:50:43,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182097099] [2022-12-14 09:50:43,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:50:43,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:50:43,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:50:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:50:43,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:50:43,249 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:50:43,328 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-12-14 09:50:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:50:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 09:50:43,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:50:43,329 INFO L225 Difference]: With dead ends: 27 [2022-12-14 09:50:43,329 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 09:50:43,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:50:43,330 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:50:43,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:50:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 09:50:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 09:50:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:50:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-12-14 09:50:43,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-12-14 09:50:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:50:43,334 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-12-14 09:50:43,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-12-14 09:50:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:50:43,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:43,335 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:50:43,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:50:43,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:43,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:43,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1508307811, now seen corresponding path program 3 times [2022-12-14 09:50:43,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:43,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726844266] [2022-12-14 09:50:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:43,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:43,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:50:43,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525836589] [2022-12-14 09:50:43,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:50:43,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:50:43,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:50:43,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:50:43,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:50:43,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:50:43,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 09:50:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:50:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:43,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:50:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:44,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:50:44,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726844266] [2022-12-14 09:50:44,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:50:44,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525836589] [2022-12-14 09:50:44,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525836589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:50:44,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177369004] [2022-12-14 09:50:44,031 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:50:44,031 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:50:44,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:50:44,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:50:44,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:50:44,148 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 09:50:44,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:50:44,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '546#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:50:44,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:50:44,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:50:44,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-14 09:50:44,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902085912] [2022-12-14 09:50:44,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:50:44,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 09:50:44,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:50:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 09:50:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-14 09:50:44,447 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:50:44,698 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-12-14 09:50:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:50:44,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:50:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:50:44,700 INFO L225 Difference]: With dead ends: 32 [2022-12-14 09:50:44,700 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 09:50:44,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:50:44,701 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:50:44,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 52 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:50:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 09:50:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 09:50:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:50:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-14 09:50:44,706 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2022-12-14 09:50:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:50:44,706 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-14 09:50:44,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:50:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-14 09:50:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:50:44,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:50:44,707 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:50:44,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:50:44,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:44,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:50:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:50:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash -419027398, now seen corresponding path program 4 times [2022-12-14 09:50:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:50:44,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90420167] [2022-12-14 09:50:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:50:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:50:44,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:50:44,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262747786] [2022-12-14 09:50:44,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:50:44,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:50:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:50:44,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:50:44,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:50:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:50:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 09:50:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:50:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:50:45,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:51:47,867 WARN L233 SmtUtils]: Spent 36.59s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:52:26,596 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 2))) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse9 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse19 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse2 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse15 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse10 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse13))) (.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse17 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse20 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse0 (not .cse7)) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse18 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or .cse0 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse1 .cse2)) 0) (not (= .cse3 .cse4))) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse5 .cse6)) 0) .cse7 (not (= .cse8 .cse9)) .cse10) (or .cse0 (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse8)) (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0)) (or .cse0 (not (= .cse3 .cse11)) (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse12 .cse13)) 0)) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse11)) .cse7) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse2)) 0) (not (= .cse14 .cse11)) (not (< .cse4 .cse1)) .cse7) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse5 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) (not (= .cse15 .cse6)) (not (< .cse4 |c_ULTIMATE.start_gcd_test_~b#1|)) .cse7) (or (not (= .cse15 .cse1)) (not (< .cse16 .cse6)) (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse17)) 0)) (or .cse0 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse12)) 0) (not (= .cse13 .cse18))) (or .cse0 (not (= .cse8 .cse16)) (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse19)) 0)) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse4 .cse19)) 0) (not (= .cse1 .cse9)) .cse7 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= .cse15 .cse14)) .cse7 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse13 .cse19)) 0) .cse10) (or .cse0 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse6 .cse2)) 0) (not (= .cse16 .cse18))) (or (not (= .cse15 .cse8)) (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse20 .cse4)) 0) .cse7 .cse10) (or (not (= .cse11 .cse18)) .cse0 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse1 .cse17)) 0)) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse20)) 0) .cse0 (not (= .cse4 .cse18)))))) is different from true [2022-12-14 09:56:58,804 WARN L233 SmtUtils]: Spent 2.74m on a formula simplification that was a NOOP. DAG size: 139 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:56:58,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 1 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-14 09:56:58,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:56:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90420167] [2022-12-14 09:56:58,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:56:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262747786] [2022-12-14 09:56:58,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262747786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:56:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306392931] [2022-12-14 09:56:58,808 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:56:58,808 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:56:58,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:56:58,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:56:58,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:56:58,932 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 09:56:58,943 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:57:07,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '747#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:57:07,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:57:07,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:57:07,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2022-12-14 09:57:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650324610] [2022-12-14 09:57:07,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:57:07,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:57:07,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:57:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:57:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=688, Unknown=7, NotChecked=54, Total=870 [2022-12-14 09:57:07,470 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 23 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:09,523 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse7 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 2))) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse9 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse19 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse2 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse15 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse10 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse13))) (.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse17 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse20 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse0 (not .cse7)) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse18 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or .cse0 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse1 .cse2)) 0) (not (= .cse3 .cse4))) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse5 .cse6)) 0) .cse7 (not (= .cse8 .cse9)) .cse10) (or .cse0 (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse8)) (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0)) (or .cse0 (not (= .cse3 .cse11)) (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse12 .cse13)) 0)) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse11)) .cse7) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse2)) 0) (not (= .cse14 .cse11)) (not (< .cse4 .cse1)) .cse7) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse5 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) (not (= .cse15 .cse6)) (not (< .cse4 |c_ULTIMATE.start_gcd_test_~b#1|)) .cse7) (or (not (= .cse15 .cse1)) (not (< .cse16 .cse6)) (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse17)) 0)) (or .cse0 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse12)) 0) (not (= .cse13 .cse18))) (= |c_ULTIMATE.start_gcd_test_~b#1| 18) (= |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (= |c_ULTIMATE.start_main_~x~0#1| 63) (or .cse0 (not (= .cse8 .cse16)) (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse19)) 0)) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse4 .cse19)) 0) (not (= .cse1 .cse9)) .cse7 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= .cse15 .cse14)) .cse7 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse13 .cse19)) 0) .cse10) (or .cse0 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse6 .cse2)) 0) (not (= .cse16 .cse18))) (or (not (= .cse15 .cse8)) (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse20 .cse4)) 0) .cse7 .cse10) (or (not (= .cse11 .cse18)) .cse0 (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ .cse1 .cse17)) 0)) (or (= (mod |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse20)) 0) .cse0 (not (= .cse4 .cse18)))))) is different from true [2022-12-14 09:57:11,639 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 [] [2022-12-14 09:57:15,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 09:57:17,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 09:57:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:57:17,538 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-12-14 09:57:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:57:17,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:57:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:57:17,541 INFO L225 Difference]: With dead ends: 36 [2022-12-14 09:57:17,541 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 09:57:17,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 238.9s TimeCoverageRelationStatistics Valid=154, Invalid=837, Unknown=9, NotChecked=122, Total=1122 [2022-12-14 09:57:17,543 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:57:17,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 163 Invalid, 1 Unknown, 21 Unchecked, 5.9s Time] [2022-12-14 09:57:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 09:57:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 09:57:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 09:57:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2022-12-14 09:57:17,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 13 [2022-12-14 09:57:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:57:17,548 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2022-12-14 09:57:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:57:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2022-12-14 09:57:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:57:17,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:57:17,549 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:57:17,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:57:17,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:17,751 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:57:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:57:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -598996777, now seen corresponding path program 1 times [2022-12-14 09:57:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:57:17,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68109939] [2022-12-14 09:57:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:17,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:57:17,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:57:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176716004] [2022-12-14 09:57:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:57:17,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:57:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:57:17,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:57:17,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:57:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:57:17,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 09:57:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:57:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:57:18,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:57:28,550 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse3 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (let ((.cse0 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (and (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse0)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (let ((.cse1 (+ |c_ULTIMATE.start_gcd_test_~b#1| (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse1) 0)) (not (= (* |c_ULTIMATE.start_gcd_test_~b#1| 2) .cse0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse1) 0) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse2)))))) .cse3) (or (let ((.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (let ((.cse4 (+ |c_ULTIMATE.start_gcd_test_~a#1| (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse4) 0) (not (= .cse5 .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse4) 0)))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= .cse5 |c_ULTIMATE.start_gcd_test_~a#1|)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))))) (not .cse3)))) is different from true [2022-12-14 09:58:04,643 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse4 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse7 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse8 (not .cse12))) (and (or (and (let ((.cse0 (+ .cse3 .cse4))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse0) 0) (not (= .cse1 .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse0) 0)))) (let ((.cse5 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse5) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse5) 0)) (not (= .cse6 .cse2))))) .cse8) (or (and (let ((.cse9 (+ |c_ULTIMATE.start_gcd_test_~b#1| (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse9) 0)) (not (= .cse10 .cse3)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse9) 0) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse2)))) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0))) .cse12) (or (let ((.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (let ((.cse13 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse13) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse13) 0) (not (= .cse14 .cse11)))) (let ((.cse15 (+ .cse16 .cse7))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse15) 0)) (not (= .cse14 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse15) 0))))) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse16))) (or (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse6)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse17 (+ |c_ULTIMATE.start_gcd_test_~a#1| (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)) (not (= .cse1 .cse16))))) .cse8)))) is different from true [2022-12-14 10:01:18,115 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse21 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse13 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse9 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (not .cse0) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse11 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse2 (+ .cse5 .cse6))) (or (= 0 (mod |c_ULTIMATE.start_main_~y~0#1| .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse2) 0)) (not (= .cse3 .cse4)))) (let ((.cse7 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse7) 0) (not (= .cse1 .cse8)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse7) 0)))) (let ((.cse12 (+ .cse5 .cse13))) (or (not (= .cse10 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse12) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse12) 0))) (let ((.cse14 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse16))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse14) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse14) 0)) (not (= .cse15 .cse11)))) (let ((.cse17 (+ .cse16 .cse15))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= .cse3 .cse10)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)))) (let ((.cse18 (+ .cse19 .cse6))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse18) 0) (not (= .cse8 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse18) 0)))) (let ((.cse20 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21))) (or (not (= .cse4 .cse11)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse20) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse20) 0))))))) (or (let ((.cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse28 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse24 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse26 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse23 (* |c_ULTIMATE.start_gcd_test_~a#1| 8))) (and (or (and (let ((.cse22 (+ .cse24 .cse19))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse22) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse22) 0) (not (= .cse1 .cse23)))) (let ((.cse25 (+ .cse15 .cse9))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse25) 0)) (not (= .cse26 .cse27)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse25) 0)))) .cse28) (or (and (let ((.cse29 (+ .cse21 .cse4))) (or (not (= .cse26 .cse1)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse29) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse29) 0))) (let ((.cse30 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse6))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse30) 0)) (not (= .cse27 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse30) 0)))) .cse28) (let ((.cse31 (+ .cse24 |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= .cse26 .cse19)) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse8)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse31) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse31) 0)))) (or (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4)) (and (let ((.cse32 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse13))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse32) 0)) (not (= .cse26 .cse5)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse32) 0))) (let ((.cse33 (+ .cse4 .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse33) 0) (not (= .cse5 .cse23)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse33) 0)))))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)))) .cse0))) is different from false [2022-12-14 10:01:20,119 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse21 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse13 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse9 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (not .cse0) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse11 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse2 (+ .cse5 .cse6))) (or (= 0 (mod |c_ULTIMATE.start_main_~y~0#1| .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse2) 0)) (not (= .cse3 .cse4)))) (let ((.cse7 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse7) 0) (not (= .cse1 .cse8)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse7) 0)))) (let ((.cse12 (+ .cse5 .cse13))) (or (not (= .cse10 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse12) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse12) 0))) (let ((.cse14 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse16))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse14) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse14) 0)) (not (= .cse15 .cse11)))) (let ((.cse17 (+ .cse16 .cse15))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= .cse3 .cse10)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)))) (let ((.cse18 (+ .cse19 .cse6))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse18) 0) (not (= .cse8 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse18) 0)))) (let ((.cse20 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21))) (or (not (= .cse4 .cse11)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse20) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse20) 0))))))) (or (let ((.cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse28 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse24 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse26 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse23 (* |c_ULTIMATE.start_gcd_test_~a#1| 8))) (and (or (and (let ((.cse22 (+ .cse24 .cse19))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse22) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse22) 0) (not (= .cse1 .cse23)))) (let ((.cse25 (+ .cse15 .cse9))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse25) 0)) (not (= .cse26 .cse27)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse25) 0)))) .cse28) (or (and (let ((.cse29 (+ .cse21 .cse4))) (or (not (= .cse26 .cse1)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse29) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse29) 0))) (let ((.cse30 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse6))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse30) 0)) (not (= .cse27 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse30) 0)))) .cse28) (let ((.cse31 (+ .cse24 |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= .cse26 .cse19)) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse8)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse31) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse31) 0)))) (or (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4)) (and (let ((.cse32 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse13))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse32) 0)) (not (= .cse26 .cse5)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse32) 0))) (let ((.cse33 (+ .cse4 .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse33) 0) (not (= .cse5 .cse23)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse33) 0)))))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)))) .cse0))) is different from true [2022-12-14 10:04:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2022-12-14 10:04:18,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:04:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68109939] [2022-12-14 10:04:18,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 10:04:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176716004] [2022-12-14 10:04:18,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176716004] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:04:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034804904] [2022-12-14 10:04:18,356 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 10:04:18,356 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:04:18,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:04:18,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:04:18,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:04:18,494 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2022-12-14 10:04:18,547 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:04:20,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '977#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:04:20,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:04:20,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:04:20,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-12-14 10:04:20,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056583362] [2022-12-14 10:04:20,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 10:04:20,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:04:20,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:04:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:04:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=871, Unknown=4, NotChecked=186, Total=1190 [2022-12-14 10:04:20,554 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:04:22,572 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse21 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse19 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse8 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse13 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse9 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (= |c_ULTIMATE.start_main_~y~0#1| 18) (= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) (or (not .cse0) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse11 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse2 (+ .cse5 .cse6))) (or (= 0 (mod |c_ULTIMATE.start_main_~y~0#1| .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse2) 0)) (not (= .cse3 .cse4)))) (let ((.cse7 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse7) 0) (not (= .cse1 .cse8)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse7) 0)))) (let ((.cse12 (+ .cse5 .cse13))) (or (not (= .cse10 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse12) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse12) 0))) (let ((.cse14 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse16))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse14) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse14) 0)) (not (= .cse15 .cse11)))) (let ((.cse17 (+ .cse16 .cse15))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= .cse3 .cse10)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)))) (let ((.cse18 (+ .cse19 .cse6))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse18) 0) (not (= .cse8 .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse18) 0)))) (let ((.cse20 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse21))) (or (not (= .cse4 .cse11)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse20) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse20) 0))))))) (or (let ((.cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse28 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse24 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse26 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse23 (* |c_ULTIMATE.start_gcd_test_~a#1| 8))) (and (or (and (let ((.cse22 (+ .cse24 .cse19))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse22) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse22) 0) (not (= .cse1 .cse23)))) (let ((.cse25 (+ .cse15 .cse9))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse25) 0)) (not (= .cse26 .cse27)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse25) 0)))) .cse28) (or (and (let ((.cse29 (+ .cse21 .cse4))) (or (not (= .cse26 .cse1)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse29) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse29) 0))) (let ((.cse30 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse6))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse30) 0)) (not (= .cse27 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse30) 0)))) .cse28) (let ((.cse31 (+ .cse24 |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= .cse26 .cse19)) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse8)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse31) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse31) 0)))) (or (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4)) (and (let ((.cse32 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse13))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse32) 0)) (not (= .cse26 .cse5)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse32) 0))) (let ((.cse33 (+ .cse4 .cse9))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse33) 0) (not (= .cse5 .cse23)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse33) 0)))))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)))) .cse0) (= |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) (= |c_ULTIMATE.start_main_~x~0#1| 63))) is different from true [2022-12-14 10:04:24,588 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse12 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (let ((.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse4 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse7 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse16 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse8 (not .cse12))) (and (or (and (let ((.cse0 (+ .cse3 .cse4))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse0) 0) (not (= .cse1 .cse2)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse0) 0)))) (let ((.cse5 (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse5) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse5) 0)) (not (= .cse6 .cse2))))) .cse8) (or (and (let ((.cse9 (+ |c_ULTIMATE.start_gcd_test_~b#1| (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse9) 0)) (not (= .cse10 .cse3)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse9) 0) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse2)))) (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse11)) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0)) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0))) .cse12) (= |c_ULTIMATE.start_main_~y~0#1| 18) (= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) (= |c_ULTIMATE.start_main_~x~0#1| (+ |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (= |c_ULTIMATE.start_main_~x~0#1| 63) (or (let ((.cse14 (* |c_ULTIMATE.start_gcd_test_~b#1| 3))) (and (let ((.cse13 (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse13) 0)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse13) 0) (not (= .cse14 .cse11)))) (let ((.cse15 (+ .cse16 .cse7))) (or (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse15) 0)) (not (= .cse14 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse15) 0))))) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse16))) (or (and (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse6)) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0))) (let ((.cse17 (+ |c_ULTIMATE.start_gcd_test_~a#1| (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)))) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| .cse17) 0) (not (= (mod |c_ULTIMATE.start_main_~x~0#1| .cse17) 0)) (not (= .cse1 .cse16))))) .cse8)))) is different from true [2022-12-14 10:04:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:04:25,621 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2022-12-14 10:04:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:04:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-12-14 10:04:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:04:25,622 INFO L225 Difference]: With dead ends: 19 [2022-12-14 10:04:25,622 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 10:04:25,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=163, Invalid=1041, Unknown=6, NotChecked=350, Total=1560 [2022-12-14 10:04:25,623 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:04:25,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 38 Unchecked, 0.8s Time] [2022-12-14 10:04:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 10:04:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 10:04:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-12-14 10:04:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 10:04:25,623 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2022-12-14 10:04:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:04:25,624 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 10:04:25,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 10:04:25,624 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 10:04:25,624 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 10:04:25,625 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 10:04:25,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:04:25,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d16570ab-91de-4df3-afc7-11bce58c5383/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:04:25,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.