./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW --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 5e702e85c3d7f91108386d3bed8993d879aa98d42d10adbcd14f5fa9bf29e29b --- 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-4e7fbc6 [2022-11-23 14:43:43,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:43:43,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:43:43,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:43:43,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:43:43,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:43:43,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:43:43,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:43:43,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:43:43,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:43:43,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:43:43,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:43:43,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:43:43,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:43:43,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:43:43,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:43:43,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:43:43,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:43:43,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:43:43,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:43:43,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:43:43,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:43:43,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:43:43,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:43:43,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:43:43,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:43:43,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:43:43,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:43:43,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:43:43,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:43:43,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:43:43,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:43:43,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:43:43,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:43:43,596 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:43:43,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:43:43,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:43:43,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:43:43,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:43:43,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:43:43,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:43:43,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:43:43,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:43:43,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:43:43,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:43:43,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:43:43,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:43:43,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:43:43,630 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:43:43,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:43:43,630 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:43:43,631 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:43:43,631 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:43:43,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:43:43,631 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:43:43,632 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:43:43,632 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:43:43,632 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:43:43,632 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:43:43,633 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:43:43,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:43:43,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:43:43,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:43:43,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:43:43,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:43:43,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:43:43,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:43:43,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:43:43,635 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:43:43,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:43:43,636 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:43:43,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:43:43,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:43:43,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:43:43,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:43:43,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:43:43,637 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:43:43,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:43:43,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:43:43,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:43:43,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:43:43,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:43:43,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:43:43,639 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_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e702e85c3d7f91108386d3bed8993d879aa98d42d10adbcd14f5fa9bf29e29b [2022-11-23 14:43:43,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:43:44,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:43:44,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:43:44,015 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:43:44,016 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:43:44,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/gcd_4+newton_3_8.i [2022-11-23 14:43:47,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:43:47,547 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:43:47,547 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i [2022-11-23 14:43:47,556 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/data/2c570259e/2cdf3e4bbdce474f9397ea21cb309c99/FLAG7d82a403f [2022-11-23 14:43:47,570 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/data/2c570259e/2cdf3e4bbdce474f9397ea21cb309c99 [2022-11-23 14:43:47,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:43:47,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:43:47,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:43:47,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:43:47,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:43:47,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da78f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47, skipping insertion in model container [2022-11-23 14:43:47,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:43:47,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:43:47,836 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i[1224,1237] [2022-11-23 14:43:47,859 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i[2848,2861] [2022-11-23 14:43:47,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:43:47,870 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:43:47,883 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i[1224,1237] [2022-11-23 14:43:47,893 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i[2848,2861] [2022-11-23 14:43:47,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:43:47,908 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:43:47,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47 WrapperNode [2022-11-23 14:43:47,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:43:47,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:43:47,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:43:47,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:43:47,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,953 INFO L138 Inliner]: procedures = 27, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 85 [2022-11-23 14:43:47,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:43:47,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:43:47,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:43:47,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:43:47,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,978 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:43:47,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:43:47,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:43:47,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:43:47,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (1/1) ... [2022-11-23 14:43:47,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:43:48,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:48,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:43:48,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:43:48,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:43:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-23 14:43:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-23 14:43:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-23 14:43:48,061 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-23 14:43:48,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:43:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:43:48,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:43:48,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:43:48,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:43:48,134 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:43:48,136 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:43:48,391 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:43:48,492 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:43:48,493 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:43:48,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:48 BoogieIcfgContainer [2022-11-23 14:43:48,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:43:48,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:43:48,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:43:48,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:43:48,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:43:47" (1/3) ... [2022-11-23 14:43:48,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43731b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:48, skipping insertion in model container [2022-11-23 14:43:48,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:47" (2/3) ... [2022-11-23 14:43:48,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43731b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:48, skipping insertion in model container [2022-11-23 14:43:48,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:48" (3/3) ... [2022-11-23 14:43:48,518 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_8.i [2022-11-23 14:43:48,563 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:43:48,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:43:48,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:43:48,654 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;@2acfc40b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:43:48,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:43:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:43:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:43:48,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:48,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:48,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash 259234294, now seen corresponding path program 1 times [2022-11-23 14:43:48,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:48,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126016091] [2022-11-23 14:43:48,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:48,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:48,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:43:48,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753399496] [2022-11-23 14:43:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:48,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:48,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:48,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:48,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:43:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:43:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:48,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:43:48,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:48,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126016091] [2022-11-23 14:43:48,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:43:48,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753399496] [2022-11-23 14:43:48,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753399496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:48,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:43:48,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:43:48,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259294261] [2022-11-23 14:43:48,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:49,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:43:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:43:49,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:43:49,057 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:49,143 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-11-23 14:43:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:43:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:43:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:49,157 INFO L225 Difference]: With dead ends: 56 [2022-11-23 14:43:49,163 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 14:43:49,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:43:49,170 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:49,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 63 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:43:49,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 14:43:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-11-23 14:43:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:43:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-23 14:43:49,212 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 8 [2022-11-23 14:43:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:49,213 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-23 14:43:49,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-23 14:43:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:43:49,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:49,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:49,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:49,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 14:43:49,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash -659222671, now seen corresponding path program 1 times [2022-11-23 14:43:49,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:49,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207449305] [2022-11-23 14:43:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:49,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:49,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:43:49,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799906175] [2022-11-23 14:43:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:49,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:49,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:49,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:49,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:43:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:49,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:43:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:49,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:43:49,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:49,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207449305] [2022-11-23 14:43:49,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:43:49,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799906175] [2022-11-23 14:43:49,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799906175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:43:49,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:43:49,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:43:49,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333687575] [2022-11-23 14:43:49,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:43:49,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:43:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:43:49,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:43:49,571 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:49,600 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-23 14:43:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:43:49,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:43:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:49,604 INFO L225 Difference]: With dead ends: 41 [2022-11-23 14:43:49,604 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 14:43:49,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:43:49,609 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:49,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:43:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 14:43:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 14:43:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:43:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-23 14:43:49,621 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 9 [2022-11-23 14:43:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:49,621 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-23 14:43:49,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-23 14:43:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:43:49,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:49,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:49,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:49,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 14:43:49,835 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:49,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash -239223413, now seen corresponding path program 1 times [2022-11-23 14:43:49,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:49,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630165904] [2022-11-23 14:43:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:49,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:43:49,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638530451] [2022-11-23 14:43:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:49,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:49,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:49,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:49,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:43:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:49,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:43:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:50,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:50,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630165904] [2022-11-23 14:43:50,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:43:50,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638530451] [2022-11-23 14:43:50,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638530451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:50,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758476456] [2022-11-23 14:43:50,186 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:43:50,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:50,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:50,199 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:50,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:50,793 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 14:43:50,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:51,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '384#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:43:51,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:43:51,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:43:51,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-23 14:43:51,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964242710] [2022-11-23 14:43:51,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:43:51,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:43:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:51,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:43:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:43:51,344 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:51,439 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-11-23 14:43:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:43:51,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:43:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:51,442 INFO L225 Difference]: With dead ends: 43 [2022-11-23 14:43:51,442 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 14:43:51,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:43:51,445 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:51,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:43:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 14:43:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-23 14:43:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:43:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-23 14:43:51,454 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 10 [2022-11-23 14:43:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:51,454 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-23 14:43:51,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-23 14:43:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:43:51,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:51,477 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:51,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:51,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:51,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash -211787189, now seen corresponding path program 2 times [2022-11-23 14:43:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:51,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540077408] [2022-11-23 14:43:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:51,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:43:51,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489785935] [2022-11-23 14:43:51,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:43:51,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:51,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:51,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:43:51,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:43:51,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:43:51,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:43:51,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:51,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:52,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:52,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540077408] [2022-11-23 14:43:52,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:43:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489785935] [2022-11-23 14:43:52,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489785935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:52,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132154927] [2022-11-23 14:43:52,076 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:43:52,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:52,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:52,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:52,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:52,344 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 14:43:52,373 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:52,993 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:43:52,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:43:52,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:43:52,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-23 14:43:52,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825423650] [2022-11-23 14:43:52,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:43:52,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:43:52,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:43:52,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:43:52,996 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:53,166 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-11-23 14:43:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:43:53,167 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 14:43:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:53,168 INFO L225 Difference]: With dead ends: 44 [2022-11-23 14:43:53,168 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 14:43:53,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:43:53,170 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:53,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 156 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:43:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 14:43:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-23 14:43:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:43:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-23 14:43:53,181 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 12 [2022-11-23 14:43:53,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:53,181 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-23 14:43:53,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-23 14:43:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:43:53,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:53,183 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:53,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:53,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:53,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash 746374641, now seen corresponding path program 3 times [2022-11-23 14:43:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:53,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117155348] [2022-11-23 14:43:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:53,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:53,414 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:43:53,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795773098] [2022-11-23 14:43:53,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:43:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:53,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:53,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:43:53,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:43:53,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:43:53,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:43:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:53,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:53,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:43:53,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117155348] [2022-11-23 14:43:53,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:43:53,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795773098] [2022-11-23 14:43:53,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795773098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965131332] [2022-11-23 14:43:54,001 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:43:54,001 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:54,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:54,001 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:54,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:54,199 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 14:43:54,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:43:54,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '798#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:43:54,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:43:54,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:43:54,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-23 14:43:54,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783887560] [2022-11-23 14:43:54,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:43:54,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:43:54,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:43:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:43:54,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:43:54,724 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:55,154 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-11-23 14:43:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:43:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 14:43:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:55,156 INFO L225 Difference]: With dead ends: 49 [2022-11-23 14:43:55,156 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 14:43:55,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:43:55,158 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:55,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 154 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:43:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 14:43:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-23 14:43:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:43:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-11-23 14:43:55,169 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 13 [2022-11-23 14:43:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:55,170 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-11-23 14:43:55,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:43:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-11-23 14:43:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:43:55,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:55,171 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:55,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:43:55,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:55,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:43:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash 384620299, now seen corresponding path program 4 times [2022-11-23 14:43:55,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:43:55,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049585880] [2022-11-23 14:43:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:43:55,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:43:55,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:43:55,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828706968] [2022-11-23 14:43:55,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:43:55,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:43:55,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:43:55,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:43:55,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:43:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:43:55,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 14:43:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:55,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:10,477 WARN L233 SmtUtils]: Spent 8.95s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:45:14,985 WARN L233 SmtUtils]: Spent 52.75s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:49:27,404 WARN L233 SmtUtils]: Spent 3.01m on a formula simplification that was a NOOP. DAG size: 141 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:50:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:08,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049585880] [2022-11-23 14:50:08,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:50:08,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828706968] [2022-11-23 14:50:08,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828706968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:50:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [319783416] [2022-11-23 14:50:08,970 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:50:08,970 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:50:08,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:50:08,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:50:08,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:50:09,170 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 14:50:09,186 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:50:19,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1055#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:50:19,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:50:19,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:50:19,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-23 14:50:19,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800376911] [2022-11-23 14:50:19,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:50:19,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 14:50:19,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:19,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 14:50:19,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=739, Unknown=10, NotChecked=0, Total=870 [2022-11-23 14:50:19,851 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:50:22,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:50:24,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:50:28,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:50:30,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:50:33,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:50:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:33,606 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-11-23 14:50:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:50:33,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:50:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:33,608 INFO L225 Difference]: With dead ends: 53 [2022-11-23 14:50:33,608 INFO L226 Difference]: Without dead ends: 36 [2022-11-23 14:50:33,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 280.4s TimeCoverageRelationStatistics Valid=152, Invalid=893, Unknown=11, NotChecked=0, Total=1056 [2022-11-23 14:50:33,610 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 32 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:33,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 245 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 211 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2022-11-23 14:50:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-23 14:50:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-23 14:50:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 14:50:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-23 14:50:33,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2022-11-23 14:50:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:33,620 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-23 14:50:33,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:50:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-23 14:50:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 14:50:33,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:33,621 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:50:33,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 14:50:33,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:33,826 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1742833996, now seen corresponding path program 1 times [2022-11-23 14:50:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:33,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057956333] [2022-11-23 14:50:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:33,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:33,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:50:33,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672292281] [2022-11-23 14:50:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:33,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:33,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:33,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:50:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:33,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 14:50:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:34,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:50:50,941 WARN L233 SmtUtils]: Spent 8.30s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:51:26,242 WARN L233 SmtUtils]: Spent 23.30s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:52:11,757 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse16 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (let ((.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse8 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse18 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse7 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse19 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse14 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse20 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse10 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse0 (not .cse16))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse3 .cse4)) 0)) (or .cse0 (not (= .cse5 .cse6)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7)) 0)) (or (let ((.cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| 4))) (and (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse4 .cse7)) 0) (not (= .cse8 .cse9))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) 0) (not (= .cse9 .cse2))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 .cse12)) 0) (not (= .cse5 .cse13))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse14 .cse15)) 0) (not (= .cse8 .cse5))))) .cse16 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= .cse8 .cse12)) (<= |c_ULTIMATE.start_gcd_test_~b#1| .cse15) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) .cse16) (or (not (= .cse8 .cse17)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18)) 0) .cse19) (or .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse12 .cse10)) 0) (not (= .cse6 .cse20))) (or (not (= .cse2 .cse20)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse17 .cse18)) 0) .cse0) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse2)) .cse16) (or (not (= .cse17 .cse13)) .cse16 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse15 .cse7)) 0) .cse19) (or (and (or (not (= .cse15 .cse20)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse14)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0) (not (= .cse4 .cse20))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse17 .cse10)) 0) (not (= .cse1 .cse15))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse5)))) .cse0)))) is different from true [2022-11-23 14:56:40,352 WARN L233 SmtUtils]: Spent 2.80m on a formula simplification that was a NOOP. DAG size: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:56:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-23 14:56:40,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:56:40,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057956333] [2022-11-23 14:56:40,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:56:40,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672292281] [2022-11-23 14:56:40,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672292281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:56:40,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508099023] [2022-11-23 14:56:40,363 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 14:56:40,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:56:40,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:56:40,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:56:40,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:56:40,628 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2022-11-23 14:56:40,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:56:51,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1337#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:56:51,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:56:51,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:56:51,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2022-11-23 14:56:51,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817940383] [2022-11-23 14:56:51,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:56:51,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 14:56:51,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:56:51,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 14:56:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=845, Unknown=10, NotChecked=60, Total=1056 [2022-11-23 14:56:51,388 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:56:53,614 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse16 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (let ((.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse8 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse18 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse7 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse19 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse14 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse20 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse10 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse0 (not .cse16))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse3 .cse4)) 0)) (or .cse0 (not (= .cse5 .cse6)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7)) 0)) (= |c_ULTIMATE.start_main1_~y~0#1| 18) (or (let ((.cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| 4))) (and (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse4 .cse7)) 0) (not (= .cse8 .cse9))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) 0) (not (= .cse9 .cse2))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 .cse12)) 0) (not (= .cse5 .cse13))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse14 .cse15)) 0) (not (= .cse8 .cse5))))) .cse16 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= .cse8 .cse12)) (<= |c_ULTIMATE.start_gcd_test_~b#1| .cse15) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) .cse16) (or (not (= .cse8 .cse17)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18)) 0) .cse19) (or .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse12 .cse10)) 0) (not (= .cse6 .cse20))) (or (not (= .cse2 .cse20)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse17 .cse18)) 0) .cse0) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse2)) .cse16) (or (not (= .cse17 .cse13)) .cse16 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse15 .cse7)) 0) .cse19) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) (= |c_ULTIMATE.start_gcd_test_~a#1| 63) (or (and (or (not (= .cse15 .cse20)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse14)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0) (not (= .cse4 .cse20))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse17 .cse10)) 0) (not (= .cse1 .cse15))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse5)))) .cse0)))) is different from true [2022-11-23 14:56:55,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:56:58,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:57:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:02,215 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-11-23 14:57:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:57:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-11-23 14:57:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:02,216 INFO L225 Difference]: With dead ends: 36 [2022-11-23 14:57:02,216 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 14:57:02,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 246.5s TimeCoverageRelationStatistics Valid=175, Invalid=1012, Unknown=11, NotChecked=134, Total=1332 [2022-11-23 14:57:02,217 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:02,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 300 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 197 Invalid, 2 Unknown, 35 Unchecked, 6.0s Time] [2022-11-23 14:57:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 14:57:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 14:57:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:57:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-23 14:57:02,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 19 [2022-11-23 14:57:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:02,221 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-23 14:57:02,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:57:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-23 14:57:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:57:02,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:02,223 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:02,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:02,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:57:02,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1049715433, now seen corresponding path program 1 times [2022-11-23 14:57:02,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:02,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555373438] [2022-11-23 14:57:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:02,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:57:02,450 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:57:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:57:02,487 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:57:02,487 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:57:02,488 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-23 14:57:02,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-23 14:57:02,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:57:02,495 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2022-11-23 14:57:02,498 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:57:02,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:57:02 BoogieIcfgContainer [2022-11-23 14:57:02,531 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:57:02,532 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:57:02,532 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:57:02,532 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:57:02,533 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:48" (3/4) ... [2022-11-23 14:57:02,537 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 14:57:02,537 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:57:02,537 INFO L158 Benchmark]: Toolchain (without parser) took 794963.14ms. Allocated memory was 180.4MB in the beginning and 264.2MB in the end (delta: 83.9MB). Free memory was 146.1MB in the beginning and 218.8MB in the end (delta: -72.8MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2022-11-23 14:57:02,538 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 125.8MB. Free memory is still 93.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:57:02,538 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.47ms. Allocated memory is still 180.4MB. Free memory was 146.1MB in the beginning and 142.4MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 14:57:02,539 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.97ms. Allocated memory is still 180.4MB. Free memory was 142.4MB in the beginning and 140.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:57:02,539 INFO L158 Benchmark]: Boogie Preprocessor took 26.64ms. Allocated memory is still 180.4MB. Free memory was 140.3MB in the beginning and 139.5MB in the end (delta: 791.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:57:02,539 INFO L158 Benchmark]: RCFGBuilder took 514.17ms. Allocated memory is still 180.4MB. Free memory was 139.5MB in the beginning and 122.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 14:57:02,540 INFO L158 Benchmark]: TraceAbstraction took 794033.24ms. Allocated memory was 180.4MB in the beginning and 264.2MB in the end (delta: 83.9MB). Free memory was 122.8MB in the beginning and 218.8MB in the end (delta: -96.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:57:02,540 INFO L158 Benchmark]: Witness Printer took 5.12ms. Allocated memory is still 264.2MB. Free memory is still 218.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:57:02,543 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 125.8MB. Free memory is still 93.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 333.47ms. Allocated memory is still 180.4MB. Free memory was 146.1MB in the beginning and 142.4MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.97ms. Allocated memory is still 180.4MB. Free memory was 142.4MB in the beginning and 140.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.64ms. Allocated memory is still 180.4MB. Free memory was 140.3MB in the beginning and 139.5MB in the end (delta: 791.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 514.17ms. Allocated memory is still 180.4MB. Free memory was 139.5MB in the beginning and 122.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 794033.24ms. Allocated memory was 180.4MB in the beginning and 264.2MB in the end (delta: 83.9MB). Free memory was 122.8MB in the beginning and 218.8MB in the end (delta: -96.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.12ms. Allocated memory is still 264.2MB. Free memory is still 218.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -2.0f && IN < 2.0f) [L82] COND FALSE !(!cond) [L98] RET assume_abort_if_not(IN > -2.0f && IN < 2.0f) [L100] CALL, EXPR f(IN) VAL [unknown-#in~x-unknown=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L100] RET, EXPR f(IN) VAL [f(IN)=109, IN=111] [L100] CALL, EXPR fp(IN) VAL [unknown-#in~x-unknown=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L100] RET, EXPR fp(IN) VAL [f(IN)=109, fp(IN)=113, IN=111] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [unknown-#in~x-unknown=112] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L102] RET, EXPR f(x) VAL [f(x)=110, IN=111, x=112] [L102] CALL, EXPR fp(x) VAL [unknown-#in~x-unknown=112] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L102] RET, EXPR fp(x) VAL [f(x)=110, fp(x)=116, IN=111, x=112] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [unknown-#in~x-unknown=115] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L104] RET, EXPR f(x) VAL [f(x)=117, IN=111, x=115] [L104] CALL, EXPR fp(x) VAL [unknown-#in~x-unknown=115] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L104] RET, EXPR fp(x) VAL [f(x)=117, fp(x)=114, IN=111, x=115] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=111] [L109] reach_error() VAL [IN=111] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 793.9s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 25.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 69 SdHoareTripleChecker+Valid, 17.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 64 mSDsluCounter, 1080 SdHoareTripleChecker+Invalid, 17.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 35 IncrementalHoareTripleChecker+Unchecked, 887 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 570 IncrementalHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 193 mSDtfsCounter, 570 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 529.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 741.0s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 2933 SizeOfPredicates, 33 NumberOfNonLiveVariables, 548 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 4/98 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-23 14:57:02,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW --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 5e702e85c3d7f91108386d3bed8993d879aa98d42d10adbcd14f5fa9bf29e29b --- 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-4e7fbc6 [2022-11-23 14:57:05,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:57:05,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:57:05,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:57:05,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:57:05,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:57:05,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:57:05,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:57:05,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:57:05,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:57:05,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:57:05,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:57:05,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:57:05,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:57:05,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:57:05,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:57:05,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:57:05,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:57:05,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:57:05,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:57:05,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:57:05,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:57:05,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:57:05,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:57:05,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:57:05,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:57:05,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:57:05,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:57:05,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:57:05,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:57:05,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:57:05,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:57:05,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:57:05,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:57:05,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:57:05,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:57:05,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:57:05,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:57:05,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:57:05,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:57:05,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:57:05,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-23 14:57:05,290 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:57:05,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:57:05,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:57:05,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:57:05,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:57:05,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:57:05,294 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:57:05,294 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:57:05,295 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:57:05,295 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:57:05,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:57:05,296 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:57:05,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:57:05,298 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:57:05,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:57:05,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:57:05,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:57:05,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:57:05,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:57:05,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:57:05,300 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:57:05,300 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:57:05,300 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:57:05,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:57:05,301 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:57:05,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:57:05,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:57:05,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:57:05,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:57:05,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:57:05,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:57:05,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:57:05,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:57:05,304 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:57:05,304 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:57:05,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:57:05,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:57:05,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:57:05,306 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_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e702e85c3d7f91108386d3bed8993d879aa98d42d10adbcd14f5fa9bf29e29b [2022-11-23 14:57:05,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:57:05,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:57:05,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:57:05,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:57:05,763 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:57:05,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/gcd_4+newton_3_8.i [2022-11-23 14:57:08,881 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:57:09,139 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:57:09,141 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i [2022-11-23 14:57:09,169 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/data/f8e15aae9/25f2edc247654f0d8636e99b1748d607/FLAGe220afa2e [2022-11-23 14:57:09,183 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/data/f8e15aae9/25f2edc247654f0d8636e99b1748d607 [2022-11-23 14:57:09,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:57:09,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:57:09,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:57:09,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:57:09,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:57:09,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bc2c845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09, skipping insertion in model container [2022-11-23 14:57:09,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:57:09,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:57:09,389 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i[1224,1237] [2022-11-23 14:57:09,416 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i[2848,2861] [2022-11-23 14:57:09,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:57:09,433 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:57:09,448 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i[1224,1237] [2022-11-23 14:57:09,459 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/sv-benchmarks/c/combinations/gcd_4+newton_3_8.i[2848,2861] [2022-11-23 14:57:09,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:57:09,476 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:57:09,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09 WrapperNode [2022-11-23 14:57:09,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:57:09,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:57:09,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:57:09,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:57:09,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,553 INFO L138 Inliner]: procedures = 28, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 82 [2022-11-23 14:57:09,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:57:09,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:57:09,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:57:09,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:57:09,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,610 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:57:09,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:57:09,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:57:09,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:57:09,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (1/1) ... [2022-11-23 14:57:09,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:57:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:09,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:57:09,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:57:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:57:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 14:57:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-23 14:57:09,728 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-23 14:57:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-23 14:57:09,730 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-23 14:57:09,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:57:09,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:57:09,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:57:09,731 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:57:09,845 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:57:09,848 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:57:19,367 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:57:19,376 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:57:19,376 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:57:19,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:19 BoogieIcfgContainer [2022-11-23 14:57:19,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:57:19,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:57:19,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:57:19,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:57:19,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:57:09" (1/3) ... [2022-11-23 14:57:19,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6d5666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:57:19, skipping insertion in model container [2022-11-23 14:57:19,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:57:09" (2/3) ... [2022-11-23 14:57:19,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f6d5666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:57:19, skipping insertion in model container [2022-11-23 14:57:19,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:57:19" (3/3) ... [2022-11-23 14:57:19,391 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_8.i [2022-11-23 14:57:19,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:57:19,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:57:19,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:57:19,508 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;@6891c2d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:57:19,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:57:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:57:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:57:19,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:19,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:19,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-11-23 14:57:19,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:57:19,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273233946] [2022-11-23 14:57:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:19,550 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 [2022-11-23 14:57:19,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:57:19,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:57:19,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:57:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:19,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:57:19,840 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:57:19,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273233946] [2022-11-23 14:57:19,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273233946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:19,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:19,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:57:19,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453171858] [2022-11-23 14:57:19,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:19,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:57:19,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:57:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:57:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:19,904 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:20,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:20,023 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-11-23 14:57:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:57:20,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:57:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:20,036 INFO L225 Difference]: With dead ends: 99 [2022-11-23 14:57:20,037 INFO L226 Difference]: Without dead ends: 46 [2022-11-23 14:57:20,041 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 [2022-11-23 14:57:20,051 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:20,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-23 14:57:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-11-23 14:57:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:57:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-23 14:57:20,111 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-11-23 14:57:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:20,112 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-23 14:57:20,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-23 14:57:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:57:20,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:20,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:20,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:20,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:20,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-11-23 14:57:20,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:57:20,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415919211] [2022-11-23 14:57:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:20,333 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 [2022-11-23 14:57:20,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:57:20,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:57:20,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:57:20,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:20,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:57:20,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:57:20,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415919211] [2022-11-23 14:57:20,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415919211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:20,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:20,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:57:20,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337260840] [2022-11-23 14:57:20,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:20,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:57:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:57:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:57:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:20,511 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:20,595 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-11-23 14:57:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:57:20,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 14:57:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:20,598 INFO L225 Difference]: With dead ends: 55 [2022-11-23 14:57:20,598 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 14:57:20,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:20,601 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:20,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 14:57:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-23 14:57:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:57:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-23 14:57:20,611 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-11-23 14:57:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:20,611 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-23 14:57:20,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-23 14:57:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:57:20,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:20,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:20,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:20,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:20,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-11-23 14:57:20,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:57:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428890612] [2022-11-23 14:57:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:20,832 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 [2022-11-23 14:57:20,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:57:20,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:57:20,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:57:20,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:21,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:57:21,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:57:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428890612] [2022-11-23 14:57:21,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428890612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:57:21,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:57:21,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:57:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772278640] [2022-11-23 14:57:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:57:21,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:57:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:57:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:57:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:21,227 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:21,326 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-23 14:57:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:57:21,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 14:57:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:21,331 INFO L225 Difference]: With dead ends: 56 [2022-11-23 14:57:21,332 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 14:57:21,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:57:21,334 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:21,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:57:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 14:57:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-23 14:57:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:57:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-23 14:57:21,351 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-11-23 14:57:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:21,352 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-23 14:57:21,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-23 14:57:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:57:21,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:21,353 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:21,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:21,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:21,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-11-23 14:57:21,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:57:21,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850023586] [2022-11-23 14:57:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:21,570 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 [2022-11-23 14:57:21,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:57:21,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:57:21,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:21,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:57:21,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:22,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:22,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:57:22,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850023586] [2022-11-23 14:57:22,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850023586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:22,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1016255415] [2022-11-23 14:57:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:22,263 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:57:22,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:57:22,267 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:57:22,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-23 14:57:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:22,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:57:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:22,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:22,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1016255415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:22,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142465573] [2022-11-23 14:57:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:22,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:22,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:22,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:57:22,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:57:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:57:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:23,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:23,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142465573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:23,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:57:23,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 10 [2022-11-23 14:57:23,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533247146] [2022-11-23 14:57:23,755 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:57:23,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:57:23,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:57:23,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:57:23,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:57:23,757 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:24,306 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-11-23 14:57:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:57:24,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:57:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:24,309 INFO L225 Difference]: With dead ends: 63 [2022-11-23 14:57:24,309 INFO L226 Difference]: Without dead ends: 50 [2022-11-23 14:57:24,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:57:24,318 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:24,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 227 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:57:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-23 14:57:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-11-23 14:57:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:57:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-23 14:57:24,333 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 17 [2022-11-23 14:57:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:24,334 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-23 14:57:24,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-23 14:57:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:57:24,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:24,340 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:57:24,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:24,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:24,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:24,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:24,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash -727680455, now seen corresponding path program 2 times [2022-11-23 14:57:24,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:57:24,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705908316] [2022-11-23 14:57:24,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:57:24,947 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 [2022-11-23 14:57:24,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:57:24,948 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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) [2022-11-23 14:57:24,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/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 [2022-11-23 14:57:25,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:57:25,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:57:25,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:57:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:57:26,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:57:36,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:57:36,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705908316] [2022-11-23 14:57:36,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705908316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:36,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [704881273] [2022-11-23 14:57:36,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:57:36,479 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:57:36,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:57:36,481 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:57:36,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-23 14:57:36,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:57:36,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:57:36,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:57:36,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:57:38,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:57:41,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [704881273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:41,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822013143] [2022-11-23 14:57:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:57:41,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:41,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:41,185 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:57:41,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162be1a3-8075-464d-9690-0e77a8056b6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:57:41,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:57:41,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:57:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:57:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:42,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:46,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822013143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:46,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:57:46,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6, 6, 8, 8] total 36 [2022-11-23 14:57:46,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873137469] [2022-11-23 14:57:46,370 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:57:46,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 14:57:46,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:57:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 14:57:46,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 14:57:46,372 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 36 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:57:58,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 14:58:17,774 WARN L233 SmtUtils]: Spent 9.10s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:58:20,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 14:58:22,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 14:58:44,437 WARN L233 SmtUtils]: Spent 10.79s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)