./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS --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 4c99a7d37e4951c8ef9fe39502528fd8fe86fdb39a219c9a8916753f22b09b28 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:18:38,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:18:38,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:18:39,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:18:39,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:18:39,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:18:39,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:18:39,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:18:39,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:18:39,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:18:39,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:18:39,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:18:39,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:18:39,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:18:39,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:18:39,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:18:39,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:18:39,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:18:39,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:18:39,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:18:39,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:18:39,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:18:39,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:18:39,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:18:39,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:18:39,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:18:39,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:18:39,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:18:39,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:18:39,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:18:39,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:18:39,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:18:39,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:18:39,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:18:39,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:18:39,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:18:39,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:18:39,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:18:39,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:18:39,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:18:39,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:18:39,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:18:39,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:18:39,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:18:39,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:18:39,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:18:39,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:18:39,175 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:18:39,176 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:18:39,176 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:18:39,176 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:18:39,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:18:39,178 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:18:39,178 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:18:39,179 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:18:39,179 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:18:39,179 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:18:39,180 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:18:39,180 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:18:39,180 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:18:39,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:18:39,182 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:18:39,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:18:39,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:18:39,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:18:39,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:18:39,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:18:39,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:18:39,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:18:39,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:18:39,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:18:39,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:18:39,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:18:39,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:18:39,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:18:39,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:18:39,187 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:18:39,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:18:39,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:18:39,188 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:18:39,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:18:39,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:18:39,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:18:39,189 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_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c99a7d37e4951c8ef9fe39502528fd8fe86fdb39a219c9a8916753f22b09b28 [2022-11-19 07:18:39,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:18:39,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:18:39,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:18:39,567 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:18:39,568 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:18:39,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i [2022-11-19 07:18:39,659 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data/57204bc06/de66750f782b429c88dd507703096ebe/FLAGc90cae2d0 [2022-11-19 07:18:40,202 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:18:40,202 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i [2022-11-19 07:18:40,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data/57204bc06/de66750f782b429c88dd507703096ebe/FLAGc90cae2d0 [2022-11-19 07:18:40,568 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data/57204bc06/de66750f782b429c88dd507703096ebe [2022-11-19 07:18:40,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:18:40,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:18:40,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:18:40,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:18:40,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:18:40,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:40,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3daecd31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40, skipping insertion in model container [2022-11-19 07:18:40,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:40,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:18:40,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:18:40,836 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[1226,1239] [2022-11-19 07:18:40,864 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[2841,2854] [2022-11-19 07:18:40,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:18:40,876 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:18:40,905 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[1226,1239] [2022-11-19 07:18:40,917 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[2841,2854] [2022-11-19 07:18:40,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:18:40,948 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:18:40,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40 WrapperNode [2022-11-19 07:18:40,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:18:40,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:18:40,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:18:40,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:18:40,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:40,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,027 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-11-19 07:18:41,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:18:41,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:18:41,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:18:41,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:18:41,045 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,079 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:18:41,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:18:41,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:18:41,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:18:41,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (1/1) ... [2022-11-19 07:18:41,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:18:41,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:41,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:18:41,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:18:41,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:18:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 07:18:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 07:18:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 07:18:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 07:18:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:18:41,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:18:41,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:18:41,300 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:18:41,307 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:18:41,488 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:18:41,576 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:18:41,577 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:18:41,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:18:41 BoogieIcfgContainer [2022-11-19 07:18:41,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:18:41,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:18:41,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:18:41,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:18:41,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:18:40" (1/3) ... [2022-11-19 07:18:41,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69aab3f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:18:41, skipping insertion in model container [2022-11-19 07:18:41,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:40" (2/3) ... [2022-11-19 07:18:41,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69aab3f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:18:41, skipping insertion in model container [2022-11-19 07:18:41,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:18:41" (3/3) ... [2022-11-19 07:18:41,591 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_8.i [2022-11-19 07:18:41,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:18:41,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:18:41,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:18:41,702 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;@7286c91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:18:41,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:18:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:18:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:18:41,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:41,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:18:41,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash -499021812, now seen corresponding path program 1 times [2022-11-19 07:18:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930494887] [2022-11-19 07:18:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:41,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:18:42,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930494887] [2022-11-19 07:18:42,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930494887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:42,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:18:42,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:18:42,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021001802] [2022-11-19 07:18:42,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:42,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:18:42,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:18:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:18:42,374 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:18:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:42,622 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-19 07:18:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:18:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:18:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:42,634 INFO L225 Difference]: With dead ends: 45 [2022-11-19 07:18:42,634 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:18:42,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:18:42,642 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:42,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 64 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:18:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:18:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 07:18:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:18:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-19 07:18:42,690 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2022-11-19 07:18:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:42,691 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-19 07:18:42,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:18:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-19 07:18:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:18:42,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:42,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:42,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:18:42,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:42,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1643785969, now seen corresponding path program 1 times [2022-11-19 07:18:42,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:42,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717751106] [2022-11-19 07:18:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:42,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:42,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:18:42,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288386845] [2022-11-19 07:18:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:42,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:42,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:42,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:42,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:18:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:18:42,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:51,539 WARN L233 SmtUtils]: Spent 7.63s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:18:54,010 WARN L859 $PredicateComparison]: unable to prove that (or (and (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (< |c_ULTIMATE.start_main1_~x~0#1| 0) (let ((.cse1 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse0 (<= .cse1 127))) (or (and (not .cse0) (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= 0 (mod (+ .cse1 (- 256)) |ULTIMATE.start_gcd_test_#res#1|)) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (not (= |ULTIMATE.start_gcd_test_#res#1| 0))))) (and .cse0 (exists ((|ULTIMATE.start_gcd_test_#res#1| Int)) (and (<= |c_ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= (mod (mod .cse1 |ULTIMATE.start_gcd_test_#res#1|) 256) 0) (not (= |ULTIMATE.start_gcd_test_#res#1| 0)))))))))) is different from true [2022-11-19 07:18:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:18:54,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:00,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717751106] [2022-11-19 07:19:00,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:19:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288386845] [2022-11-19 07:19:00,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288386845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705996830] [2022-11-19 07:19:00,424 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 07:19:00,424 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:19:00,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:19:00,434 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:19:00,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:19:00,673 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:19:02,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '175#(and (= |ULTIMATE.start_gcd_test_~b#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~b#1| 128)) (<= |ULTIMATE.start_gcd_test_#in~a#1| 127) (< 0 |ULTIMATE.start_main1_~x~0#1|) (<= |ULTIMATE.start_gcd_test_#in~b#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ |ULTIMATE.start_gcd_test_#in~a#1| 128)) (= (ite (<= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_main1_~x~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_gcd_test_#res#1| 127) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main1_~g~0#1| |ULTIMATE.start_gcd_test_#res#1|) (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_gcd_test_#res#1|) (<= |ULTIMATE.start_main1_~y~0#1| 127) (<= 0 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_main1_~y~0#1| 128)) (= |#NULL.base| 0))' at error location [2022-11-19 07:19:02,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:19:02,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:19:02,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-19 07:19:02,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708377337] [2022-11-19 07:19:02,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:02,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:19:02,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:02,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:19:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=145, Unknown=3, NotChecked=24, Total=210 [2022-11-19 07:19:02,064 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:04,802 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 [] [2022-11-19 07:19:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:19:07,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 139 [2022-11-19 07:19:07,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=38, Invalid=145, Unknown=3, NotChecked=24, Total=210 [2022-11-19 07:19:07,310 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:07,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 1 Unknown, 10 Unchecked, 2.7s Time] [2022-11-19 07:19:07,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:19:07,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:07,513 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:86) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:898) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:772) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:346) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 49 more [2022-11-19 07:19:07,519 INFO L158 Benchmark]: Toolchain (without parser) took 26945.49ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 101.0MB in the beginning and 130.1MB in the end (delta: -29.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:19:07,519 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory is still 117.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:19:07,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 373.98ms. Allocated memory is still 138.4MB. Free memory was 100.9MB in the beginning and 113.4MB in the end (delta: -12.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:19:07,521 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.79ms. Allocated memory is still 138.4MB. Free memory was 112.7MB in the beginning and 111.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:19:07,521 INFO L158 Benchmark]: Boogie Preprocessor took 50.47ms. Allocated memory is still 138.4MB. Free memory was 111.3MB in the beginning and 109.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:19:07,522 INFO L158 Benchmark]: RCFGBuilder took 495.67ms. Allocated memory is still 138.4MB. Free memory was 109.8MB in the beginning and 94.5MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 07:19:07,523 INFO L158 Benchmark]: TraceAbstraction took 25935.47ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 93.7MB in the beginning and 130.1MB in the end (delta: -36.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:19:07,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 138.4MB. Free memory is still 117.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 373.98ms. Allocated memory is still 138.4MB. Free memory was 100.9MB in the beginning and 113.4MB in the end (delta: -12.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.79ms. Allocated memory is still 138.4MB. Free memory was 112.7MB in the beginning and 111.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.47ms. Allocated memory is still 138.4MB. Free memory was 111.3MB in the beginning and 109.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 495.67ms. Allocated memory is still 138.4MB. Free memory was 109.8MB in the beginning and 94.5MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 25935.47ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 93.7MB in the beginning and 130.1MB in the end (delta: -36.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS --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 4c99a7d37e4951c8ef9fe39502528fd8fe86fdb39a219c9a8916753f22b09b28 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:19:09,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:19:09,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:19:09,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:19:09,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:19:09,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:19:09,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:19:09,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:19:09,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:19:09,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:19:09,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:19:09,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:19:09,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:19:09,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:19:09,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:19:09,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:19:09,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:19:09,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:19:09,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:19:09,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:19:09,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:19:09,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:19:09,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:19:09,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:19:09,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:19:09,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:19:09,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:19:09,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:19:09,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:19:09,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:19:09,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:19:09,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:19:09,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:19:09,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:19:09,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:19:09,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:19:09,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:19:09,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:19:09,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:19:09,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:19:09,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:19:09,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-19 07:19:09,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:19:09,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:19:09,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:19:09,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:19:09,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:19:09,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:19:09,967 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:19:09,967 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:19:09,967 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:19:09,968 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:19:09,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:19:09,968 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:19:09,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:19:09,969 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:19:09,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:19:09,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:19:09,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:19:09,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:19:09,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:19:09,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:19:09,971 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:19:09,971 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:19:09,971 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:19:09,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:19:09,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:19:09,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:19:09,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:19:09,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:19:09,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:19:09,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:19:09,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:19:09,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:19:09,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:19:09,973 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:19:09,974 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:09,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:19:09,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:19:09,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:19:09,975 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c99a7d37e4951c8ef9fe39502528fd8fe86fdb39a219c9a8916753f22b09b28 [2022-11-19 07:19:10,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:19:10,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:19:10,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:19:10,463 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:19:10,464 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:19:10,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_3+newton_2_8.i [2022-11-19 07:19:10,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data/3862bc013/6477948b263a4ec2b7cdd78ebf7e080e/FLAGf52eac80f [2022-11-19 07:19:11,116 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:19:11,116 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i [2022-11-19 07:19:11,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data/3862bc013/6477948b263a4ec2b7cdd78ebf7e080e/FLAGf52eac80f [2022-11-19 07:19:11,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/data/3862bc013/6477948b263a4ec2b7cdd78ebf7e080e [2022-11-19 07:19:11,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:19:11,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:19:11,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:19:11,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:19:11,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:19:11,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54ca1c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11, skipping insertion in model container [2022-11-19 07:19:11,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:19:11,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:19:11,773 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[1226,1239] [2022-11-19 07:19:11,812 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[2841,2854] [2022-11-19 07:19:11,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:19:11,853 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:19:11,877 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[1226,1239] [2022-11-19 07:19:11,887 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/sv-benchmarks/c/combinations/gcd_3+newton_2_8.i[2841,2854] [2022-11-19 07:19:11,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:19:11,907 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:19:11,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11 WrapperNode [2022-11-19 07:19:11,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:19:11,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:19:11,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:19:11,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:19:11,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,950 INFO L138 Inliner]: procedures = 28, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 80 [2022-11-19 07:19:11,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:19:11,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:19:11,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:19:11,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:19:11,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,980 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:19:11,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:19:11,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:19:11,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:19:11,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (1/1) ... [2022-11-19 07:19:11,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:19:12,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:12,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:19:12,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:19:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:19:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:19:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 07:19:12,078 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 07:19:12,078 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 07:19:12,079 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 07:19:12,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:19:12,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:19:12,159 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:19:12,162 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:19:21,327 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:19:21,336 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:19:21,337 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:19:21,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:19:21 BoogieIcfgContainer [2022-11-19 07:19:21,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:19:21,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:19:21,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:19:21,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:19:21,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:19:11" (1/3) ... [2022-11-19 07:19:21,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373605e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:19:21, skipping insertion in model container [2022-11-19 07:19:21,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:19:11" (2/3) ... [2022-11-19 07:19:21,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373605e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:19:21, skipping insertion in model container [2022-11-19 07:19:21,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:19:21" (3/3) ... [2022-11-19 07:19:21,351 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3+newton_2_8.i [2022-11-19 07:19:21,374 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:19:21,374 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:19:21,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:19:21,441 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;@14ecd673, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:19:21,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:19:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:19:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:19:21,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:21,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:21,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1709385323, now seen corresponding path program 1 times [2022-11-19 07:19:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:21,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181747913] [2022-11-19 07:19:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:21,495 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:21,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:21,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:19:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:21,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:19:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:21,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:21,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:21,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181747913] [2022-11-19 07:19:21,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181747913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:21,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:21,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:19:21,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505349687] [2022-11-19 07:19:21,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:21,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:21,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:21,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:21,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:21,771 INFO L87 Difference]: Start difference. First operand has 37 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:21,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:21,820 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-11-19 07:19:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:21,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:19:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:21,830 INFO L225 Difference]: With dead ends: 68 [2022-11-19 07:19:21,831 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 07:19:21,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:21,838 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:21,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 4 Unchecked, 0.0s Time] [2022-11-19 07:19:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 07:19:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 07:19:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:19:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-19 07:19:21,882 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2022-11-19 07:19:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:21,883 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-19 07:19:21,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:21,884 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-19 07:19:21,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:19:21,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:21,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:21,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-19 07:19:22,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:22,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:22,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash 65622039, now seen corresponding path program 1 times [2022-11-19 07:19:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:22,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888569354] [2022-11-19 07:19:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:22,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:22,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:22,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:22,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:19:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:22,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:19:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:22,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:22,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:22,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888569354] [2022-11-19 07:19:22,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888569354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:22,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:22,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:19:22,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47729641] [2022-11-19 07:19:22,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:22,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:19:22,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:19:22,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:19:22,349 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:22,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:22,511 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-19 07:19:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:19:22,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:19:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:22,513 INFO L225 Difference]: With dead ends: 46 [2022-11-19 07:19:22,514 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:19:22,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:19:22,516 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:22,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:19:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:19:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-19 07:19:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:19:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-19 07:19:22,526 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-19 07:19:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:22,526 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-19 07:19:22,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-19 07:19:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:19:22,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:22,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:22,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:22,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash -743724587, now seen corresponding path program 1 times [2022-11-19 07:19:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:22,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137121658] [2022-11-19 07:19:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:22,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:22,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:22,761 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:22,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:19:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:19:22,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:23,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:23,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:23,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137121658] [2022-11-19 07:19:23,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137121658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:23,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:23,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:19:23,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198554950] [2022-11-19 07:19:23,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:23,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:19:23,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:19:23,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:19:23,350 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:24,121 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-19 07:19:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:19:24,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:19:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:24,123 INFO L225 Difference]: With dead ends: 37 [2022-11-19 07:19:24,123 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:19:24,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:19:24,125 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:24,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 155 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:19:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:19:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-11-19 07:19:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:19:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-19 07:19:24,134 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 11 [2022-11-19 07:19:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:24,134 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-19 07:19:24,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:24,135 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-19 07:19:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:19:24,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:24,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:24,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-19 07:19:24,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:24,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:24,356 INFO L85 PathProgramCache]: Analyzing trace with hash 830014046, now seen corresponding path program 1 times [2022-11-19 07:19:24,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:24,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832198210] [2022-11-19 07:19:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:24,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:24,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:24,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:24,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:19:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:24,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:19:24,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:27,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:45,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:45,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832198210] [2022-11-19 07:19:45,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832198210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [900323723] [2022-11-19 07:19:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:19:45,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:19:45,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-19 07:19:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:19:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:02,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:18,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [900323723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317549519] [2022-11-19 07:20:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:18,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:18,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:18,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:20:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:20:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:36,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317549519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:36,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:20:36,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 28 [2022-11-19 07:20:36,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186787202] [2022-11-19 07:20:36,094 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:36,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:20:36,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:20:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=611, Unknown=11, NotChecked=0, Total=756 [2022-11-19 07:20:36,096 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:41,960 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-11-19 07:20:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:20:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:20:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:41,967 INFO L225 Difference]: With dead ends: 47 [2022-11-19 07:20:41,967 INFO L226 Difference]: Without dead ends: 34 [2022-11-19 07:20:41,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 69.8s TimeCoverageRelationStatistics Valid=141, Invalid=660, Unknown=11, NotChecked=0, Total=812 [2022-11-19 07:20:41,969 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:41,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 295 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-11-19 07:20:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-19 07:20:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-11-19 07:20:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:20:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-19 07:20:41,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 12 [2022-11-19 07:20:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:41,977 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-19 07:20:41,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-19 07:20:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:20:41,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:41,978 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:41,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:42,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:42,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:42,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:42,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:42,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1518646018, now seen corresponding path program 2 times [2022-11-19 07:20:42,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:20:42,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788252819] [2022-11-19 07:20:42,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:20:42,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:42,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:20:42,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:20:42,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 07:20:47,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:20:47,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:48,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:20:48,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:08,659 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 18 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:21:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:13,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:21,761 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main1_~x~0#1_8| (_ BitVec 8))) (let ((.cse2 ((_ sign_extend 24) |v_ULTIMATE.start_main1_~x~0#1_8|)) (.cse3 ((_ sign_extend 24) ((_ extract 7 0) (bvneg ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|)))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse3))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse0))))) (or (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32))) (bvslt .cse2 (_ bv0 32)) (= .cse0 (_ bv0 32)) (bvsge .cse2 .cse1)))))) is different from false [2022-11-19 07:23:23,783 WARN L859 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 8)) (|v_ULTIMATE.start_main1_~x~0#1_8| (_ BitVec 8))) (let ((.cse2 ((_ sign_extend 24) |v_ULTIMATE.start_main1_~x~0#1_8|)) (.cse3 ((_ sign_extend 24) ((_ extract 7 0) (bvneg ((_ sign_extend 24) |ULTIMATE.start_gcd_test_~b#1|)))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse3))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse0))))) (or (not (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32))) (bvslt .cse2 (_ bv0 32)) (= .cse0 (_ bv0 32)) (bvsge .cse2 .cse1)))))) is different from true [2022-11-19 07:23:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:36,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:36,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788252819] [2022-11-19 07:23:36,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788252819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:36,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914173967] [2022-11-19 07:23:36,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:23:36,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:23:36,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:23:36,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:23:36,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 07:23:36,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:23:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:23:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:23:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:28,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:40,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [914173967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:40,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103795913] [2022-11-19 07:24:40,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:24:40,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:40,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:40,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:40,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:24:46,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:24:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:24:46,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:00,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103795913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:06,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:25:06,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 25 [2022-11-19 07:25:06,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381779276] [2022-11-19 07:25:06,843 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:06,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:25:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:25:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:25:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=435, Unknown=45, NotChecked=44, Total=600 [2022-11-19 07:25:06,845 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:26,018 WARN L233 SmtUtils]: Spent 15.87s on a formula simplification. DAG size of input: 31 DAG size of output: 3 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:25:49,806 WARN L233 SmtUtils]: Spent 17.73s on a formula simplification. DAG size of input: 46 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:26:34,588 WARN L233 SmtUtils]: Spent 36.79s on a formula simplification. DAG size of input: 54 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:26:50,165 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 26 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:57,937 WARN L233 SmtUtils]: Spent 25.72s on a formula simplification. DAG size of input: 45 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:19,222 WARN L233 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 33 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:33,949 WARN L233 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 33 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:47,217 WARN L233 SmtUtils]: Spent 7.37s on a formula simplification. DAG size of input: 33 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:47,236 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-11-19 07:28:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:28:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:28:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:47,238 INFO L225 Difference]: With dead ends: 47 [2022-11-19 07:28:47,239 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:28:47,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 375.2s TimeCoverageRelationStatistics Valid=167, Invalid=894, Unknown=65, NotChecked=64, Total=1190 [2022-11-19 07:28:47,241 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:47,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 392 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-19 07:28:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:28:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-11-19 07:28:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:28:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-11-19 07:28:47,252 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 14 [2022-11-19 07:28:47,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:47,253 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-11-19 07:28:47,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-11-19 07:28:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:28:47,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:47,255 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:47,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:47,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:47,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:47,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:28:47,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1825995883, now seen corresponding path program 1 times [2022-11-19 07:28:47,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:28:47,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393274758] [2022-11-19 07:28:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:47,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:47,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:28:47,875 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:28:47,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_853253c2-6a92-4a6d-ab3c-6e2a256676d6/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 07:28:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:28:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:48,241 WARN L233 SmtUtils]: Spent 10.83s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:31:05,191 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_41| (_ BitVec 8)) (|ULTIMATE.start_main1_~x~0#1| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_main1_~x~0#1|)) (.cse2 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_41|))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse2))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse0))))) (and (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32)) (not (bvslt .cse2 (_ bv0 32))) (not (bvsge .cse3 .cse1)) (not (bvslt .cse3 (_ bv0 32))))))))) is different from false [2022-11-19 07:31:07,213 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_41| (_ BitVec 8)) (|ULTIMATE.start_main1_~x~0#1| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |ULTIMATE.start_main1_~x~0#1|)) (.cse2 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_41|))) (let ((.cse4 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse2))))) (let ((.cse0 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse2 .cse4))))) (let ((.cse1 ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse0))))) (and (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))) (_ bv0 32)) (not (bvslt .cse2 (_ bv0 32))) (not (bvsge .cse3 .cse1)) (not (bvslt .cse3 (_ bv0 32))))))))) is different from true [2022-11-19 07:31:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:07,214 INFO L328 TraceCheckSpWp]: Computing backward predicates...