./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6568b5930df9b96ff5e807ba48758caa6128d98ba24e8c1d6b9a86c6290462f1 --- 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-e04fb08 [2022-11-16 12:20:18,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:20:18,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:20:18,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:20:18,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:20:18,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:20:18,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:20:18,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:20:18,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:20:18,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:20:18,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:20:18,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:20:18,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:20:18,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:20:18,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:20:18,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:20:18,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:20:18,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:20:18,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:20:18,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:20:18,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:20:18,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:20:18,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:20:18,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:20:18,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:20:18,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:20:18,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:20:18,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:20:18,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:20:18,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:20:18,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:20:18,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:20:18,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:20:18,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:20:18,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:20:18,635 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:20:18,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:20:18,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:20:18,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:20:18,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:20:18,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:20:18,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:20:18,695 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:20:18,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:20:18,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:20:18,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:20:18,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:20:18,697 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:20:18,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:20:18,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:20:18,698 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:20:18,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:20:18,699 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:20:18,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:20:18,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:20:18,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:20:18,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:20:18,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:20:18,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:20:18,701 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:20:18,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:20:18,701 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:20:18,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:20:18,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:20:18,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:20:18,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:20:18,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:20:18,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:20:18,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:20:18,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:20:18,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:20:18,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:20:18,704 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:20:18,704 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:20:18,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:20:18,705 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_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6568b5930df9b96ff5e807ba48758caa6128d98ba24e8c1d6b9a86c6290462f1 [2022-11-16 12:20:19,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:20:19,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:20:19,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:20:19,043 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:20:19,044 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:20:19,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2022-11-16 12:20:19,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/data/a80f58bce/ca550efc53a942f383129d2190e5fc64/FLAG21f5fe0fc [2022-11-16 12:20:19,622 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:20:19,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2022-11-16 12:20:19,631 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/data/a80f58bce/ca550efc53a942f383129d2190e5fc64/FLAG21f5fe0fc [2022-11-16 12:20:19,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/data/a80f58bce/ca550efc53a942f383129d2190e5fc64 [2022-11-16 12:20:19,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:20:19,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:20:19,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:20:19,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:20:19,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:20:19,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:20:19" (1/1) ... [2022-11-16 12:20:19,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25aa2eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:19, skipping insertion in model container [2022-11-16 12:20:19,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:20:19" (1/1) ... [2022-11-16 12:20:19,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:20:20,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:20:20,223 WARN L229 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_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.c[524,537] [2022-11-16 12:20:20,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:20:20,253 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:20:20,264 WARN L229 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_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound1.c[524,537] [2022-11-16 12:20:20,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:20:20,283 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:20:20,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20 WrapperNode [2022-11-16 12:20:20,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:20:20,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:20:20,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:20:20,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:20:20,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,319 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2022-11-16 12:20:20,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:20:20,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:20:20,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:20:20,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:20:20,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,356 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:20:20,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:20:20,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:20:20,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:20:20,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (1/1) ... [2022-11-16 12:20:20,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:20:20,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:20,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:20:20,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:20:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:20:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 12:20:20,458 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 12:20:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:20:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:20:20,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:20:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:20:20,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:20:20,519 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:20:20,521 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:20:20,668 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:20:20,674 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:20:20,675 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:20:20,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:20:20 BoogieIcfgContainer [2022-11-16 12:20:20,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:20:20,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:20:20,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:20:20,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:20:20,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:20:19" (1/3) ... [2022-11-16 12:20:20,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c830b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:20:20, skipping insertion in model container [2022-11-16 12:20:20,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:20" (2/3) ... [2022-11-16 12:20:20,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c830b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:20:20, skipping insertion in model container [2022-11-16 12:20:20,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:20:20" (3/3) ... [2022-11-16 12:20:20,686 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound1.c [2022-11-16 12:20:20,705 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:20:20,706 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:20:20,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:20:20,769 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f28949c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:20:20,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:20:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:20:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:20:20,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:20,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:20,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2022-11-16 12:20:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:20,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028470919] [2022-11-16 12:20:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:20,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:20,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:20,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865214538] [2022-11-16 12:20:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:20,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:20,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:20,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:20,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:20:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:21,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 12:20:21,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:20:21,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:21,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:21,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028470919] [2022-11-16 12:20:21,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:21,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865214538] [2022-11-16 12:20:21,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865214538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:21,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:21,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:20:21,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678424884] [2022-11-16 12:20:21,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:21,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:20:21,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:20:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:20:21,177 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:20:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:21,213 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-11-16 12:20:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:20:21,216 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-16 12:20:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:21,223 INFO L225 Difference]: With dead ends: 47 [2022-11-16 12:20:21,224 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 12:20:21,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:20:21,234 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:21,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:20:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 12:20:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-16 12:20:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:20:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-16 12:20:21,272 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2022-11-16 12:20:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:21,273 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-16 12:20:21,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:20:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-16 12:20:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:20:21,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:21,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:21,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:21,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 12:20:21,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:21,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2022-11-16 12:20:21,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:21,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991892760] [2022-11-16 12:20:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:21,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:21,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:21,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986210286] [2022-11-16 12:20:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:21,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:21,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:21,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:20:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:20:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:20:21,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:21,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991892760] [2022-11-16 12:20:21,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:21,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986210286] [2022-11-16 12:20:21,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986210286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:21,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:21,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:20:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482309167] [2022-11-16 12:20:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:21,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:20:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:20:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:20:21,702 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:20:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:21,736 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-16 12:20:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:20:21,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-16 12:20:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:21,738 INFO L225 Difference]: With dead ends: 30 [2022-11-16 12:20:21,739 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 12:20:21,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:20:21,741 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:21,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:20:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 12:20:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-16 12:20:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:20:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-16 12:20:21,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2022-11-16 12:20:21,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:21,750 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-16 12:20:21,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:20:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-16 12:20:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:20:21,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:21,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:21,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:21,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:21,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2022-11-16 12:20:21,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:21,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165537660] [2022-11-16 12:20:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:21,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:21,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:21,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575316061] [2022-11-16 12:20:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:21,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:21,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:22,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:22,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:20:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:22,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:20:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:20:22,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:22,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165537660] [2022-11-16 12:20:22,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575316061] [2022-11-16 12:20:22,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575316061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:22,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:22,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:20:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339417352] [2022-11-16 12:20:22,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:20:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:20:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:20:22,447 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:20:24,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:20:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:24,647 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-16 12:20:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:20:24,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-16 12:20:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:24,650 INFO L225 Difference]: With dead ends: 35 [2022-11-16 12:20:24,650 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 12:20:24,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:20:24,651 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:24,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 79 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 12:20:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 12:20:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-16 12:20:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:20:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-16 12:20:24,671 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2022-11-16 12:20:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:24,671 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-16 12:20:24,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:20:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-16 12:20:24,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 12:20:24,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:24,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:24,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:24,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:24,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2022-11-16 12:20:24,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:24,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87779943] [2022-11-16 12:20:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:24,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:24,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:24,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750542147] [2022-11-16 12:20:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:24,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:24,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:24,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:24,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:20:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:24,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:20:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:20:25,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:20:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:20:25,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:25,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87779943] [2022-11-16 12:20:25,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:25,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750542147] [2022-11-16 12:20:25,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750542147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:20:25,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:20:25,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-16 12:20:25,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444286150] [2022-11-16 12:20:25,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:20:25,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:20:25,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:20:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:20:25,183 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:20:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:25,349 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-16 12:20:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:20:25,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-11-16 12:20:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:25,350 INFO L225 Difference]: With dead ends: 39 [2022-11-16 12:20:25,350 INFO L226 Difference]: Without dead ends: 34 [2022-11-16 12:20:25,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:20:25,352 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:25,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 85 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:20:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-16 12:20:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-11-16 12:20:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:20:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-16 12:20:25,364 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2022-11-16 12:20:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:25,365 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-16 12:20:25,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:20:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-16 12:20:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 12:20:25,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:25,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:25,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:25,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2022-11-16 12:20:25,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:25,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566734618] [2022-11-16 12:20:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:25,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:25,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:25,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044862887] [2022-11-16 12:20:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:25,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:25,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:25,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:25,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:20:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:20:25,659 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:20:25,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:20:25,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:20:25,693 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:20:25,694 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 12:20:25,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:25,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:25,900 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:20:25,904 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 12:20:25,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:20:25 BoogieIcfgContainer [2022-11-16 12:20:25,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 12:20:25,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 12:20:25,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 12:20:25,948 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 12:20:25,948 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:20:20" (3/4) ... [2022-11-16 12:20:25,951 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 12:20:25,994 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 12:20:25,994 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 12:20:25,995 INFO L158 Benchmark]: Toolchain (without parser) took 6018.24ms. Allocated memory was 111.1MB in the beginning and 142.6MB in the end (delta: 31.5MB). Free memory was 67.4MB in the beginning and 107.6MB in the end (delta: -40.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:20:25,995 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 111.1MB. Free memory is still 83.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:20:25,996 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.17ms. Allocated memory is still 111.1MB. Free memory was 67.2MB in the beginning and 84.2MB in the end (delta: -17.0MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2022-11-16 12:20:25,996 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.98ms. Allocated memory is still 111.1MB. Free memory was 83.8MB in the beginning and 82.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:20:25,997 INFO L158 Benchmark]: Boogie Preprocessor took 35.74ms. Allocated memory is still 111.1MB. Free memory was 82.5MB in the beginning and 81.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:20:25,997 INFO L158 Benchmark]: RCFGBuilder took 317.71ms. Allocated memory is still 111.1MB. Free memory was 81.3MB in the beginning and 70.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:20:25,997 INFO L158 Benchmark]: TraceAbstraction took 5267.85ms. Allocated memory was 111.1MB in the beginning and 142.6MB in the end (delta: 31.5MB). Free memory was 69.5MB in the beginning and 109.7MB in the end (delta: -40.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:20:25,998 INFO L158 Benchmark]: Witness Printer took 47.15ms. Allocated memory is still 142.6MB. Free memory was 109.7MB in the beginning and 107.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:20:26,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 111.1MB. Free memory is still 83.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.17ms. Allocated memory is still 111.1MB. Free memory was 67.2MB in the beginning and 84.2MB in the end (delta: -17.0MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.98ms. Allocated memory is still 111.1MB. Free memory was 83.8MB in the beginning and 82.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.74ms. Allocated memory is still 111.1MB. Free memory was 82.5MB in the beginning and 81.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 317.71ms. Allocated memory is still 111.1MB. Free memory was 81.3MB in the beginning and 70.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 5267.85ms. Allocated memory was 111.1MB in the beginning and 142.6MB in the end (delta: 31.5MB). Free memory was 69.5MB in the beginning and 109.7MB in the end (delta: -40.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 47.15ms. Allocated memory is still 142.6MB. Free memory was 109.7MB in the beginning and 107.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [A=5, counter=0, R=3] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [A=5, counter=0, R=3] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [A=5, counter=0, r=4, R=3, u=7, v=1] [L34] EXPR counter++ VAL [A=5, counter=1, counter++=0, r=4, R=3, u=7, v=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=5, counter=1, R=3, r=4, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=5, counter=1, R=3, r=4, u=7, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [A=5, counter=1, r=3, R=3, u=7, v=3] [L34] EXPR counter++ VAL [A=5, counter=2, counter++=1, r=3, R=3, u=7, v=3] [L34] COND FALSE !(counter++<1) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=2] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=2] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.2s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 250 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 155 IncrementalHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 85 mSDtfsCounter, 155 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, InterpolantAutomatonStates: 22, 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 101 ConstructedInterpolants, 0 QuantifiedInterpolants, 355 SizeOfPredicates, 10 NumberOfNonLiveVariables, 283 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 22/24 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 proved your program to be incorrect! [2022-11-16 12:20:26,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe3f6dc3-a2e2-45ee-9081-40fe1307e986/bin/uautomizer-tPACEb0tL8/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE