./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/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_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/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_000e2b6a-0b0b-4713-8597-782bdc1c5c09/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 74ee724e3f951f784979d99a99eb9387abbe4e82f01cf4b5e019c1ec7f3be827 --- 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 11:16:53,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:16:53,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:16:53,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:16:53,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:16:53,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:16:53,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:16:53,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:16:53,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:16:53,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:16:53,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:16:53,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:16:53,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:16:53,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:16:53,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:16:53,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:16:53,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:16:53,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:16:53,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:16:53,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:16:53,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:16:53,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:16:53,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:16:53,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:16:53,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:16:53,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:16:53,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:16:53,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:16:53,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:16:53,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:16:53,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:16:53,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:16:53,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:16:53,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:16:53,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:16:53,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:16:53,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:16:53,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:16:53,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:16:53,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:16:53,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:16:53,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:16:54,004 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:16:54,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:16:54,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:16:54,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:16:54,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:16:54,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:16:54,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:16:54,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:16:54,008 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:16:54,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:16:54,009 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:16:54,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:16:54,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:16:54,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:16:54,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:16:54,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:16:54,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:16:54,011 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:16:54,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:16:54,011 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:16:54,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:16:54,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:16:54,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:16:54,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:16:54,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:16:54,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:16:54,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:16:54,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:16:54,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:16:54,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:16:54,015 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:16:54,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:16:54,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:16:54,016 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_000e2b6a-0b0b-4713-8597-782bdc1c5c09/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74ee724e3f951f784979d99a99eb9387abbe4e82f01cf4b5e019c1ec7f3be827 [2022-11-16 11:16:54,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:16:54,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:16:54,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:16:54,351 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:16:54,352 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:16:54,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2022-11-16 11:16:54,429 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/data/1d8ccda8e/60a22598ce62444e89885ab147066c01/FLAGaaf955fa4 [2022-11-16 11:16:54,981 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:16:54,981 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2022-11-16 11:16:54,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/data/1d8ccda8e/60a22598ce62444e89885ab147066c01/FLAGaaf955fa4 [2022-11-16 11:16:55,340 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/data/1d8ccda8e/60a22598ce62444e89885ab147066c01 [2022-11-16 11:16:55,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:16:55,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:16:55,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:16:55,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:16:55,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:16:55,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a96232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55, skipping insertion in model container [2022-11-16 11:16:55,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:16:55,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:16:55,641 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_000e2b6a-0b0b-4713-8597-782bdc1c5c09/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c[520,533] [2022-11-16 11:16:55,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:16:55,681 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:16:55,702 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_000e2b6a-0b0b-4713-8597-782bdc1c5c09/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound5.c[520,533] [2022-11-16 11:16:55,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:16:55,732 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:16:55,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55 WrapperNode [2022-11-16 11:16:55,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:16:55,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:16:55,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:16:55,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:16:55,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,766 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-16 11:16:55,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:16:55,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:16:55,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:16:55,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:16:55,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,809 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:16:55,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:16:55,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:16:55,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:16:55,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (1/1) ... [2022-11-16 11:16:55,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:16:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:55,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:16:55,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:16:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:16:55,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:16:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:16:55,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:16:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:16:55,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:16:55,966 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:16:55,968 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:16:56,201 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:16:56,216 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:16:56,216 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:16:56,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:16:56 BoogieIcfgContainer [2022-11-16 11:16:56,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:16:56,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:16:56,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:16:56,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:16:56,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:16:55" (1/3) ... [2022-11-16 11:16:56,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba4f673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:16:56, skipping insertion in model container [2022-11-16 11:16:56,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:16:55" (2/3) ... [2022-11-16 11:16:56,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba4f673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:16:56, skipping insertion in model container [2022-11-16 11:16:56,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:16:56" (3/3) ... [2022-11-16 11:16:56,229 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound5.c [2022-11-16 11:16:56,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:16:56,251 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:16:56,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:16:56,357 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;@7ce13711, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:16:56,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:16:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 11:16:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:16:56,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:56,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:56,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:56,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2022-11-16 11:16:56,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:56,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272535405] [2022-11-16 11:16:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:56,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:56,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:56,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272535405] [2022-11-16 11:16:56,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272535405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:56,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:56,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:16:56,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042396419] [2022-11-16 11:16:56,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:56,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:16:56,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:16:56,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:16:56,642 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:56,670 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2022-11-16 11:16:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:16:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:16:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:56,687 INFO L225 Difference]: With dead ends: 40 [2022-11-16 11:16:56,688 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 11:16:56,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 11:16:56,699 INFO L413 NwaCegarLoop]: 27 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, 27 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 11:16:56,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:16:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 11:16:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 11:16:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 11:16:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-11-16 11:16:56,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2022-11-16 11:16:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:56,746 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-16 11:16:56,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-11-16 11:16:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:16:56,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:56,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:56,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:16:56,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2022-11-16 11:16:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:56,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711109842] [2022-11-16 11:16:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:56,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:56,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:56,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711109842] [2022-11-16 11:16:56,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711109842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:56,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:56,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:16:56,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117717339] [2022-11-16 11:16:56,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:56,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:16:56,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:16:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:16:56,878 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) 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) [2022-11-16 11:16:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:56,923 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-11-16 11:16:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:16:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) 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 [2022-11-16 11:16:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:56,925 INFO L225 Difference]: With dead ends: 28 [2022-11-16 11:16:56,925 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 11:16:56,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 11:16:56,928 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 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 11:16:56,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:16:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 11:16:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-16 11:16:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 11:16:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-16 11:16:56,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2022-11-16 11:16:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:56,951 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-16 11:16:56,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) 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) [2022-11-16 11:16:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-16 11:16:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:16:56,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:56,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:16:56,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2022-11-16 11:16:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640438406] [2022-11-16 11:16:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:57,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:57,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640438406] [2022-11-16 11:16:57,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640438406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:57,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:16:57,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:16:57,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308788609] [2022-11-16 11:16:57,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:57,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:16:57,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:57,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:16:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:16:57,271 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-11-16 11:16:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:57,406 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-11-16 11:16:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:16:57,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2022-11-16 11:16:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:57,410 INFO L225 Difference]: With dead ends: 32 [2022-11-16 11:16:57,410 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 11:16:57,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:16:57,413 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:57,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:16:57,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 11:16:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-11-16 11:16:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:16:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-11-16 11:16:57,429 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2022-11-16 11:16:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:57,429 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-11-16 11:16:57,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-11-16 11:16:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-11-16 11:16:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:16:57,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:57,431 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:57,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:16:57,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:57,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2022-11-16 11:16:57,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:57,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568998293] [2022-11-16 11:16:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:57,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:16:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495623627] [2022-11-16 11:16:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:57,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:57,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:57,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:16:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:16:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:57,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:58,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:58,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568998293] [2022-11-16 11:16:58,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:16:58,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495623627] [2022-11-16 11:16:58,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495623627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:58,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:58,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-16 11:16:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769713122] [2022-11-16 11:16:58,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:58,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:16:58,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:58,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:16:58,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:16:58,010 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:16:58,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:58,222 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2022-11-16 11:16:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:16:58,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2022-11-16 11:16:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:58,225 INFO L225 Difference]: With dead ends: 40 [2022-11-16 11:16:58,225 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 11:16:58,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:16:58,235 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:58,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:16:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 11:16:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-16 11:16:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2022-11-16 11:16:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-16 11:16:58,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2022-11-16 11:16:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:58,286 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-16 11:16:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:16:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-16 11:16:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:16:58,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:58,288 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:58,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:58,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:58,495 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash 259746456, now seen corresponding path program 1 times [2022-11-16 11:16:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:58,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785534741] [2022-11-16 11:16:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:58,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:58,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:16:58,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223266469] [2022-11-16 11:16:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:58,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:58,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:58,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:58,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:16:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:58,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:16:58,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:16:58,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:16:58,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:58,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785534741] [2022-11-16 11:16:58,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:16:58,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223266469] [2022-11-16 11:16:58,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223266469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:58,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:58,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-16 11:16:58,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434067761] [2022-11-16 11:16:58,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:58,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:16:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:16:58,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:16:58,716 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:16:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:58,866 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2022-11-16 11:16:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:16:58,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2022-11-16 11:16:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:58,868 INFO L225 Difference]: With dead ends: 88 [2022-11-16 11:16:58,869 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 11:16:58,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:16:58,870 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:58,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 150 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:16:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 11:16:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-11-16 11:16:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 11:16:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-11-16 11:16:58,900 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 26 [2022-11-16 11:16:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:58,900 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-11-16 11:16:58,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:16:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-11-16 11:16:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:16:58,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:58,902 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:58,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:59,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:59,108 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash 261414752, now seen corresponding path program 1 times [2022-11-16 11:16:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337357532] [2022-11-16 11:16:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:59,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:59,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:16:59,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101901881] [2022-11-16 11:16:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:59,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:59,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:59,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:16:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:59,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:16:59,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:16:59,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:16:59,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337357532] [2022-11-16 11:16:59,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:16:59,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101901881] [2022-11-16 11:16:59,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101901881] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:59,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:16:59,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-16 11:16:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700814995] [2022-11-16 11:16:59,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:16:59,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:16:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:16:59,337 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 11:16:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:59,415 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2022-11-16 11:16:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:16:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-11-16 11:16:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:59,419 INFO L225 Difference]: With dead ends: 85 [2022-11-16 11:16:59,420 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 11:16:59,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:16:59,422 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:59,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:16:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 11:16:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-16 11:16:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 21 states have call successors, (21), 11 states have call predecessors, (21), 11 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 11:16:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-11-16 11:16:59,475 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 26 [2022-11-16 11:16:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:59,475 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-11-16 11:16:59,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 11:16:59,476 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-11-16 11:16:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:16:59,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:59,478 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:59,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:59,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:16:59,684 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:16:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:59,685 INFO L85 PathProgramCache]: Analyzing trace with hash 854826784, now seen corresponding path program 2 times [2022-11-16 11:16:59,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:59,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070194741] [2022-11-16 11:16:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:59,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:16:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404583866] [2022-11-16 11:16:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:16:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:59,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:59,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:59,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:16:59,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:16:59,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:59,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:16:59,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:16:59,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:17:00,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:17:00,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070194741] [2022-11-16 11:17:00,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:17:00,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404583866] [2022-11-16 11:17:00,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404583866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:17:00,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:17:00,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-16 11:17:00,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098035512] [2022-11-16 11:17:00,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:17:00,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:17:00,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:17:00,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:17:00,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:17:00,195 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 11:17:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:00,584 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-16 11:17:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:17:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2022-11-16 11:17:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:00,586 INFO L225 Difference]: With dead ends: 83 [2022-11-16 11:17:00,586 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 11:17:00,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 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 11:17:00,587 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:00,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:17:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 11:17:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 11:17:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 11:17:00,589 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-11-16 11:17:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:00,589 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 11:17:00,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-16 11:17:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 11:17:00,590 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 11:17:00,593 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 11:17:00,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:00,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:00,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 11:17:01,750 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-11-16 11:17:01,751 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-16 11:17:01,751 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-16 11:17:01,751 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-16 11:17:01,751 INFO L902 garLoopResultBuilder]: At program point L48(lines 21 49) the Hoare annotation is: true [2022-11-16 11:17:01,752 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-11-16 11:17:01,752 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-16 11:17:01,752 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-16 11:17:01,752 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-16 11:17:01,752 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-16 11:17:01,752 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-11-16 11:17:01,752 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-16 11:17:01,753 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-16 11:17:01,753 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-16 11:17:01,753 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2022-11-16 11:17:01,754 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-11-16 11:17:01,754 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-11-16 11:17:01,754 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-11-16 11:17:01,754 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-11-16 11:17:01,754 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-11-16 11:17:01,755 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-11-16 11:17:01,758 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-11-16 11:17:01,760 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 11:17:01,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 11:17:01 BoogieIcfgContainer [2022-11-16 11:17:01,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 11:17:01,780 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 11:17:01,780 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 11:17:01,781 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 11:17:01,781 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:16:56" (3/4) ... [2022-11-16 11:17:01,785 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 11:17:01,792 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-16 11:17:01,797 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-16 11:17:01,797 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-16 11:17:01,797 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 11:17:01,797 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 11:17:01,839 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 11:17:01,839 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 11:17:01,840 INFO L158 Benchmark]: Toolchain (without parser) took 6490.95ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 90.8MB in the beginning and 63.2MB in the end (delta: 27.6MB). Peak memory consumption was 61.1MB. Max. memory is 16.1GB. [2022-11-16 11:17:01,840 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 35.8MB in the beginning and 35.7MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:17:01,841 INFO L158 Benchmark]: CACSL2BoogieTranslator took 378.19ms. Allocated memory is still 121.6MB. Free memory was 90.8MB in the beginning and 96.9MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 11:17:01,841 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.49ms. Allocated memory is still 121.6MB. Free memory was 96.9MB in the beginning and 95.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:17:01,841 INFO L158 Benchmark]: Boogie Preprocessor took 46.74ms. Allocated memory is still 121.6MB. Free memory was 95.2MB in the beginning and 94.4MB in the end (delta: 731.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:17:01,842 INFO L158 Benchmark]: RCFGBuilder took 404.21ms. Allocated memory is still 121.6MB. Free memory was 94.0MB in the beginning and 83.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:17:01,843 INFO L158 Benchmark]: TraceAbstraction took 5558.68ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 83.2MB in the beginning and 65.3MB in the end (delta: 17.9MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. [2022-11-16 11:17:01,843 INFO L158 Benchmark]: Witness Printer took 59.00ms. Allocated memory is still 155.2MB. Free memory was 65.3MB in the beginning and 63.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:17:01,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 83.9MB. Free memory was 35.8MB in the beginning and 35.7MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 378.19ms. Allocated memory is still 121.6MB. Free memory was 90.8MB in the beginning and 96.9MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.49ms. Allocated memory is still 121.6MB. Free memory was 96.9MB in the beginning and 95.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.74ms. Allocated memory is still 121.6MB. Free memory was 95.2MB in the beginning and 94.4MB in the end (delta: 731.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 404.21ms. Allocated memory is still 121.6MB. Free memory was 94.0MB in the beginning and 83.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 5558.68ms. Allocated memory was 121.6MB in the beginning and 155.2MB in the end (delta: 33.6MB). Free memory was 83.2MB in the beginning and 65.3MB in the end (delta: 17.9MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. * Witness Printer took 59.00ms. Allocated memory is still 155.2MB. Free memory was 65.3MB in the beginning and 63.2MB 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.4s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 100 mSDsluCounter, 467 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 312 mSDsCounter, 63 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 465 IncrementalHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 63 mSolverCounterUnsat, 155 mSDtfsCounter, 465 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 213 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 142 HoareAnnotationTreeSize, 44 FomulaSimplifications, 102 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 785 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 842 SizeOfPredicates, 8 NumberOfNonLiveVariables, 340 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 156/196 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && s * 4 == t * t + 2 * t + 1 RESULT: Ultimate proved your program to be correct! [2022-11-16 11:17:01,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000e2b6a-0b0b-4713-8597-782bdc1c5c09/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 Result: TRUE