./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa --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 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:10:43,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:10:43,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:10:43,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:10:43,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:10:43,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:10:43,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:10:43,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:10:43,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:10:43,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:10:43,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:10:43,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:10:43,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:10:43,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:10:43,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:10:43,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:10:43,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:10:43,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:10:43,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:10:43,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:10:43,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:10:43,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:10:43,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:10:43,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:10:43,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:10:43,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:10:43,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:10:43,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:10:43,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:10:43,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:10:43,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:10:43,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:10:43,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:10:43,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:10:43,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:10:43,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:10:43,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:10:43,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:10:43,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:10:43,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:10:43,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:10:43,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 01:10:43,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:10:43,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:10:43,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:10:43,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:10:43,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:10:43,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:10:43,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:10:43,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:10:43,921 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:10:43,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:10:43,921 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:10:43,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:10:43,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:10:43,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:10:43,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 01:10:43,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:10:43,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 01:10:43,922 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:10:43,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 01:10:43,922 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:10:43,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 01:10:43,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:10:43,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:10:43,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:10:43,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:10:43,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:10:43,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:10:43,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 01:10:43,930 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:10:43,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:10:43,931 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 01:10:43,931 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 01:10:43,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 01:10:43,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:10:43,931 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_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b854852f8258ff198098e27d83a5b0e296df48090ebea0d59d234417af0752 [2021-12-07 01:10:44,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:10:44,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:10:44,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:10:44,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:10:44,154 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:10:44,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-12-07 01:10:44,198 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/data/f9aecdb2b/907154000bdd484098a4c1259baaee9a/FLAGd4c4f8420 [2021-12-07 01:10:44,578 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:10:44,578 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c [2021-12-07 01:10:44,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/data/f9aecdb2b/907154000bdd484098a4c1259baaee9a/FLAGd4c4f8420 [2021-12-07 01:10:44,595 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/data/f9aecdb2b/907154000bdd484098a4c1259baaee9a [2021-12-07 01:10:44,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:10:44,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:10:44,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:10:44,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:10:44,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:10:44,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b990679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44, skipping insertion in model container [2021-12-07 01:10:44,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:10:44,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:10:44,719 WARN L230 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_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2021-12-07 01:10:44,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:10:44,741 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:10:44,752 WARN L230 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_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2021-12-07 01:10:44,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:10:44,770 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:10:44,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44 WrapperNode [2021-12-07 01:10:44,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:10:44,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:10:44,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:10:44,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:10:44,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,804 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-07 01:10:44,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:10:44,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:10:44,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:10:44,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:10:44,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:10:44,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:10:44,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:10:44,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:10:44,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (1/1) ... [2021-12-07 01:10:44,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:10:44,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:44,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:10:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:10:44,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:10:44,885 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 01:10:44,885 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 01:10:44,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:10:44,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:10:44,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:10:44,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 01:10:44,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 01:10:44,938 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:10:44,940 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:10:45,037 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:10:45,042 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:10:45,042 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 01:10:45,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:10:45 BoogieIcfgContainer [2021-12-07 01:10:45,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:10:45,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:10:45,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:10:45,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:10:45,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:10:44" (1/3) ... [2021-12-07 01:10:45,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f179cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:10:45, skipping insertion in model container [2021-12-07 01:10:45,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:10:44" (2/3) ... [2021-12-07 01:10:45,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f179cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:10:45, skipping insertion in model container [2021-12-07 01:10:45,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:10:45" (3/3) ... [2021-12-07 01:10:45,049 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2021-12-07 01:10:45,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:10:45,053 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 01:10:45,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:10:45,093 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 01:10:45,094 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 01:10:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 01:10:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 01:10:45,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:45,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:45,112 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:45,116 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-12-07 01:10:45,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:45,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202572415] [2021-12-07 01:10:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:45,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:45,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 01:10:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 01:10:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:45,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 01:10:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-07 01:10:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:10:45,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:45,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202572415] [2021-12-07 01:10:45,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202572415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:45,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:45,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:10:45,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954682551] [2021-12-07 01:10:45,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:45,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 01:10:45,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:45,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 01:10:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:10:45,283 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:10:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:45,300 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-12-07 01:10:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:10:45,301 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-07 01:10:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:45,307 INFO L225 Difference]: With dead ends: 67 [2021-12-07 01:10:45,307 INFO L226 Difference]: Without dead ends: 31 [2021-12-07 01:10:45,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 01:10:45,313 INFO L933 BasicCegarLoop]: 44 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, 44 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 [2021-12-07 01:10:45,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:10:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-07 01:10:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-07 01:10:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:10:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-12-07 01:10:45,342 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-12-07 01:10:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:45,342 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-12-07 01:10:45,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:10:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-12-07 01:10:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 01:10:45,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:45,344 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:45,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:10:45,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:45,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-12-07 01:10:45,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:45,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139016213] [2021-12-07 01:10:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:45,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:45,365 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:45,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231570954] [2021-12-07 01:10:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:45,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:45,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:45,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:10:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:10:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:10:45,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:45,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:45,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139016213] [2021-12-07 01:10:45,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:45,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231570954] [2021-12-07 01:10:45,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231570954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:45,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:45,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:10:45,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473363571] [2021-12-07 01:10:45,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:45,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:10:45,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:45,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:10:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:10:45,535 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:10:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:45,613 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-12-07 01:10:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:10:45,613 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-07 01:10:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:45,615 INFO L225 Difference]: With dead ends: 50 [2021-12-07 01:10:45,615 INFO L226 Difference]: Without dead ends: 43 [2021-12-07 01:10:45,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:10:45,617 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:45,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:10:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-07 01:10:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-07 01:10:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 01:10:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-07 01:10:45,630 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-12-07 01:10:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:45,630 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-07 01:10:45,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:10:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-07 01:10:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 01:10:45,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:45,632 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:45,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:10:45,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:45,834 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-12-07 01:10:45,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:45,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294783282] [2021-12-07 01:10:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:45,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:45,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:45,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600661633] [2021-12-07 01:10:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:45,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:45,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:45,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:45,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:10:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:10:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:10:46,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:46,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294783282] [2021-12-07 01:10:46,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:46,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600661633] [2021-12-07 01:10:46,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600661633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:46,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:46,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:10:46,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973908379] [2021-12-07 01:10:46,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:46,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:10:46,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:10:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:10:46,193 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:10:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:46,223 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-12-07 01:10:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:10:46,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-07 01:10:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:46,225 INFO L225 Difference]: With dead ends: 49 [2021-12-07 01:10:46,225 INFO L226 Difference]: Without dead ends: 47 [2021-12-07 01:10:46,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:10:46,226 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:46,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 146 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:10:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-07 01:10:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-07 01:10:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-07 01:10:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-07 01:10:46,235 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-12-07 01:10:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:46,235 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-07 01:10:46,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:10:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-07 01:10:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-07 01:10:46,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:46,236 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:46,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:10:46,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:46,438 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-12-07 01:10:46,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694579224] [2021-12-07 01:10:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:46,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:46,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:46,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141138042] [2021-12-07 01:10:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:46,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:46,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:46,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:10:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:46,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:10:46,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:10:46,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 01:10:46,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694579224] [2021-12-07 01:10:46,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141138042] [2021-12-07 01:10:46,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141138042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:10:46,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:10:46,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-07 01:10:46,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526283047] [2021-12-07 01:10:46,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:46,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:10:46,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:10:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:10:46,770 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:10:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:46,871 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-12-07 01:10:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:10:46,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-12-07 01:10:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:46,873 INFO L225 Difference]: With dead ends: 99 [2021-12-07 01:10:46,873 INFO L226 Difference]: Without dead ends: 92 [2021-12-07 01:10:46,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:10:46,874 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:46,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 224 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:10:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-07 01:10:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-12-07 01:10:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-07 01:10:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-12-07 01:10:46,886 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-12-07 01:10:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:46,886 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-12-07 01:10:46,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 01:10:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-12-07 01:10:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 01:10:46,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:46,887 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:46,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:10:47,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:47,089 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-12-07 01:10:47,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:47,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719773806] [2021-12-07 01:10:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:47,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:47,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:47,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946735390] [2021-12-07 01:10:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:47,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:47,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:47,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:47,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 01:10:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:47,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:10:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:10:47,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:47,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:47,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719773806] [2021-12-07 01:10:47,420 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:47,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946735390] [2021-12-07 01:10:47,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946735390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:47,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:47,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:10:47,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632634702] [2021-12-07 01:10:47,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:47,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:10:47,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:10:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:10:47,421 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:10:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:47,450 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-12-07 01:10:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:10:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-12-07 01:10:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:47,452 INFO L225 Difference]: With dead ends: 75 [2021-12-07 01:10:47,452 INFO L226 Difference]: Without dead ends: 73 [2021-12-07 01:10:47,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:10:47,453 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:47,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 142 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:10:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-07 01:10:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-07 01:10:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-07 01:10:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-12-07 01:10:47,463 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-12-07 01:10:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:47,463 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-12-07 01:10:47,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:10:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-12-07 01:10:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 01:10:47,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:47,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:47,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 01:10:47,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:47,666 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:47,668 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-12-07 01:10:47,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:47,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236879049] [2021-12-07 01:10:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:47,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:47,708 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:47,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591125766] [2021-12-07 01:10:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:47,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:47,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:47,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:47,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 01:10:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:10:47,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:10:47,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:10:48,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:48,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236879049] [2021-12-07 01:10:48,015 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:48,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591125766] [2021-12-07 01:10:48,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591125766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:10:48,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:10:48,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-07 01:10:48,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8199080] [2021-12-07 01:10:48,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:48,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:10:48,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:48,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:10:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:10:48,017 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:10:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:48,062 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-12-07 01:10:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:10:48,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-12-07 01:10:48,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:48,064 INFO L225 Difference]: With dead ends: 95 [2021-12-07 01:10:48,064 INFO L226 Difference]: Without dead ends: 93 [2021-12-07 01:10:48,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-07 01:10:48,065 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:48,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 262 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-07 01:10:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-07 01:10:48,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-12-07 01:10:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 01:10:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-12-07 01:10:48,078 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 38 [2021-12-07 01:10:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:48,078 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-12-07 01:10:48,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:10:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-12-07 01:10:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:10:48,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:48,080 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:48,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 01:10:48,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:48,282 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-12-07 01:10:48,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:48,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274280787] [2021-12-07 01:10:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:48,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:48,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:48,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565894618] [2021-12-07 01:10:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:48,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:48,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:48,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:48,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 01:10:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:48,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:10:48,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 01:10:48,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:48,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:48,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274280787] [2021-12-07 01:10:48,574 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:48,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565894618] [2021-12-07 01:10:48,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565894618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:48,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:48,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:10:48,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725180634] [2021-12-07 01:10:48,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:48,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:10:48,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:10:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:10:48,576 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:10:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:48,611 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2021-12-07 01:10:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:10:48,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-07 01:10:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:48,613 INFO L225 Difference]: With dead ends: 126 [2021-12-07 01:10:48,613 INFO L226 Difference]: Without dead ends: 124 [2021-12-07 01:10:48,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:10:48,614 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:48,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:10:48,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-07 01:10:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2021-12-07 01:10:48,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-07 01:10:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2021-12-07 01:10:48,629 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 43 [2021-12-07 01:10:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:48,629 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2021-12-07 01:10:48,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 01:10:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2021-12-07 01:10:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:10:48,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:48,630 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:48,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 01:10:48,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:48,832 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:48,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2021-12-07 01:10:48,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:48,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197032764] [2021-12-07 01:10:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:48,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:48,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:48,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64658326] [2021-12-07 01:10:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:48,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:48,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:48,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:48,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 01:10:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:48,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 01:10:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:10:49,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:49,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:49,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197032764] [2021-12-07 01:10:49,157 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:49,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64658326] [2021-12-07 01:10:49,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64658326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:10:49,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:10:49,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-07 01:10:49,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486300819] [2021-12-07 01:10:49,158 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:49,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:10:49,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:49,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:10:49,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:10:49,158 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:10:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:49,258 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2021-12-07 01:10:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:10:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2021-12-07 01:10:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:49,260 INFO L225 Difference]: With dead ends: 133 [2021-12-07 01:10:49,260 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 01:10:49,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:10:49,261 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:49,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:10:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 01:10:49,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-12-07 01:10:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-07 01:10:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2021-12-07 01:10:49,282 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 43 [2021-12-07 01:10:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:49,282 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2021-12-07 01:10:49,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:10:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2021-12-07 01:10:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 01:10:49,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:49,283 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:49,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 01:10:49,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-07 01:10:49,485 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2021-12-07 01:10:49,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:49,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699734187] [2021-12-07 01:10:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:49,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:49,496 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:49,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649190299] [2021-12-07 01:10:49,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:10:49,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:49,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:49,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:49,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 01:10:49,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:10:49,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:10:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:10:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 01:10:49,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:49,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:49,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699734187] [2021-12-07 01:10:49,591 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:49,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649190299] [2021-12-07 01:10:49,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649190299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:49,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:49,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:10:49,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294075885] [2021-12-07 01:10:49,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:49,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:10:49,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:49,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:10:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:10:49,592 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:10:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:49,644 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2021-12-07 01:10:49,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:10:49,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-07 01:10:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:49,645 INFO L225 Difference]: With dead ends: 166 [2021-12-07 01:10:49,646 INFO L226 Difference]: Without dead ends: 110 [2021-12-07 01:10:49,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:10:49,647 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:49,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:10:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-07 01:10:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2021-12-07 01:10:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-07 01:10:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2021-12-07 01:10:49,656 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 43 [2021-12-07 01:10:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:49,656 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2021-12-07 01:10:49,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 01:10:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2021-12-07 01:10:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:10:49,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:49,657 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:49,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 01:10:49,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:49,858 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-12-07 01:10:49,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:49,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943090275] [2021-12-07 01:10:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:49,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:49,866 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:49,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339688892] [2021-12-07 01:10:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:49,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:49,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:49,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:10:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:10:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:10:49,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:10:49,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:49,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943090275] [2021-12-07 01:10:49,953 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:49,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339688892] [2021-12-07 01:10:49,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339688892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:10:49,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:10:49,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:10:49,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439171393] [2021-12-07 01:10:49,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:10:49,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:10:49,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:10:49,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:10:49,955 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:10:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:49,997 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2021-12-07 01:10:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:10:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-07 01:10:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:49,999 INFO L225 Difference]: With dead ends: 154 [2021-12-07 01:10:50,000 INFO L226 Difference]: Without dead ends: 152 [2021-12-07 01:10:50,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:10:50,001 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:50,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:10:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-07 01:10:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2021-12-07 01:10:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-07 01:10:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2021-12-07 01:10:50,022 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2021-12-07 01:10:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:50,022 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2021-12-07 01:10:50,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 01:10:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2021-12-07 01:10:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-07 01:10:50,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:50,024 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:50,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:10:50,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 01:10:50,225 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-12-07 01:10:50,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894665554] [2021-12-07 01:10:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:50,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:50,240 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:50,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493991325] [2021-12-07 01:10:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:50,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:50,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:50,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 01:10:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 01:10:50,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:10:50,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 01:10:51,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894665554] [2021-12-07 01:10:51,641 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493991325] [2021-12-07 01:10:51,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493991325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:10:51,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:10:51,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-12-07 01:10:51,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202708117] [2021-12-07 01:10:51,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:51,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 01:10:51,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 01:10:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-12-07 01:10:51,643 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-07 01:11:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:05,094 INFO L93 Difference]: Finished difference Result 310 states and 449 transitions. [2021-12-07 01:11:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 01:11:05,094 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2021-12-07 01:11:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:05,097 INFO L225 Difference]: With dead ends: 310 [2021-12-07 01:11:05,097 INFO L226 Difference]: Without dead ends: 241 [2021-12-07 01:11:05,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=548, Invalid=2208, Unknown=0, NotChecked=0, Total=2756 [2021-12-07 01:11:05,100 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:05,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 392 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-07 01:11:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-07 01:11:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2021-12-07 01:11:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 121 states have internal predecessors, (134), 73 states have call successors, (73), 11 states have call predecessors, (73), 11 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 01:11:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 279 transitions. [2021-12-07 01:11:05,147 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 279 transitions. Word has length 60 [2021-12-07 01:11:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:05,147 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 279 transitions. [2021-12-07 01:11:05,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-07 01:11:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 279 transitions. [2021-12-07 01:11:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 01:11:05,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:05,149 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:05,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 01:11:05,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 01:11:05,350 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:05,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2021-12-07 01:11:05,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:05,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365189060] [2021-12-07 01:11:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:05,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:05,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:05,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437838089] [2021-12-07 01:11:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:05,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:05,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:05,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:05,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 01:11:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:05,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 01:11:05,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-07 01:11:05,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-07 01:11:05,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365189060] [2021-12-07 01:11:05,631 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:05,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437838089] [2021-12-07 01:11:05,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437838089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:05,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:05,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-07 01:11:05,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553241984] [2021-12-07 01:11:05,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:05,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 01:11:05,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 01:11:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:11:05,633 INFO L87 Difference]: Start difference. First operand 199 states and 279 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-07 01:11:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:05,805 INFO L93 Difference]: Finished difference Result 287 states and 420 transitions. [2021-12-07 01:11:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:11:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2021-12-07 01:11:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:05,809 INFO L225 Difference]: With dead ends: 287 [2021-12-07 01:11:05,809 INFO L226 Difference]: Without dead ends: 285 [2021-12-07 01:11:05,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:11:05,809 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:05,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 245 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:11:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-07 01:11:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-12-07 01:11:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 73 states have call successors, (73), 12 states have call predecessors, (73), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 01:11:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 282 transitions. [2021-12-07 01:11:05,846 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 282 transitions. Word has length 70 [2021-12-07 01:11:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:05,847 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 282 transitions. [2021-12-07 01:11:05,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-07 01:11:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 282 transitions. [2021-12-07 01:11:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 01:11:05,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:05,848 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:05,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 01:11:06,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 01:11:06,049 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2021-12-07 01:11:06,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:06,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178920480] [2021-12-07 01:11:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:06,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:06,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:06,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897823997] [2021-12-07 01:11:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:06,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:06,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:06,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:06,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 01:11:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:11:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 01:11:06,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-07 01:11:06,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:06,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178920480] [2021-12-07 01:11:06,419 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:06,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897823997] [2021-12-07 01:11:06,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897823997] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:06,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:06,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-12-07 01:11:06,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413324300] [2021-12-07 01:11:06,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:06,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 01:11:06,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 01:11:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-07 01:11:06,420 INFO L87 Difference]: Start difference. First operand 203 states and 282 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:11:06,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:06,821 INFO L93 Difference]: Finished difference Result 250 states and 347 transitions. [2021-12-07 01:11:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:11:06,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2021-12-07 01:11:06,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:06,824 INFO L225 Difference]: With dead ends: 250 [2021-12-07 01:11:06,824 INFO L226 Difference]: Without dead ends: 248 [2021-12-07 01:11:06,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-12-07 01:11:06,825 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:06,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 324 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:11:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-07 01:11:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 211. [2021-12-07 01:11:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 130 states have internal predecessors, (143), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 01:11:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 288 transitions. [2021-12-07 01:11:06,868 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 288 transitions. Word has length 68 [2021-12-07 01:11:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:06,868 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 288 transitions. [2021-12-07 01:11:06,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:11:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 288 transitions. [2021-12-07 01:11:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 01:11:06,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:06,869 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:06,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 01:11:07,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:07,071 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:07,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:07,072 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2021-12-07 01:11:07,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:07,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148587307] [2021-12-07 01:11:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:07,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:07,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:07,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973567953] [2021-12-07 01:11:07,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:07,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:07,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:07,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:07,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 01:11:07,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:07,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:11:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 01:11:07,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:11:07,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:07,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148587307] [2021-12-07 01:11:07,232 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:07,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973567953] [2021-12-07 01:11:07,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973567953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:11:07,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:11:07,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:11:07,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010740395] [2021-12-07 01:11:07,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:11:07,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:11:07,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:11:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:11:07,234 INFO L87 Difference]: Start difference. First operand 211 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:11:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:07,290 INFO L93 Difference]: Finished difference Result 363 states and 496 transitions. [2021-12-07 01:11:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:11:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2021-12-07 01:11:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:07,292 INFO L225 Difference]: With dead ends: 363 [2021-12-07 01:11:07,292 INFO L226 Difference]: Without dead ends: 231 [2021-12-07 01:11:07,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:11:07,293 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:07,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:11:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-07 01:11:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2021-12-07 01:11:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 133 states have internal predecessors, (156), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 01:11:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 301 transitions. [2021-12-07 01:11:07,325 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 301 transitions. Word has length 73 [2021-12-07 01:11:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:07,325 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 301 transitions. [2021-12-07 01:11:07,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 01:11:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 301 transitions. [2021-12-07 01:11:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 01:11:07,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:07,326 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:07,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 01:11:07,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 01:11:07,527 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2021-12-07 01:11:07,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:07,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799267155] [2021-12-07 01:11:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:07,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:07,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:07,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021215460] [2021-12-07 01:11:07,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:11:07,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:07,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:07,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 01:11:07,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 01:11:07,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-07 01:11:07,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 01:11:07,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 01:11:11,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:11,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799267155] [2021-12-07 01:11:11,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021215460] [2021-12-07 01:11:11,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021215460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:11,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:11,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-12-07 01:11:11,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966271885] [2021-12-07 01:11:11,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:11,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:11:11,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:11:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-12-07 01:11:11,318 INFO L87 Difference]: Start difference. First operand 220 states and 301 transitions. Second operand has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-07 01:11:15,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:11:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:16,206 INFO L93 Difference]: Finished difference Result 275 states and 376 transitions. [2021-12-07 01:11:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:11:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 73 [2021-12-07 01:11:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:16,208 INFO L225 Difference]: With dead ends: 275 [2021-12-07 01:11:16,208 INFO L226 Difference]: Without dead ends: 271 [2021-12-07 01:11:16,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=288, Invalid=1271, Unknown=1, NotChecked=0, Total=1560 [2021-12-07 01:11:16,209 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 103 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:16,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 568 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-07 01:11:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-07 01:11:16,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 222. [2021-12-07 01:11:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 134 states have (on average 1.171641791044776) internal successors, (157), 134 states have internal predecessors, (157), 73 states have call successors, (73), 15 states have call predecessors, (73), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 01:11:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 302 transitions. [2021-12-07 01:11:16,254 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 302 transitions. Word has length 73 [2021-12-07 01:11:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:16,255 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 302 transitions. [2021-12-07 01:11:16,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-07 01:11:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 302 transitions. [2021-12-07 01:11:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 01:11:16,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:16,256 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:16,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 01:11:16,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 01:11:16,457 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2021-12-07 01:11:16,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:16,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959623594] [2021-12-07 01:11:16,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:16,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:16,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:16,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952922076] [2021-12-07 01:11:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:16,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:16,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:16,489 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:16,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 01:11:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:11:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-07 01:11:16,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 01:11:19,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:23,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959623594] [2021-12-07 01:11:23,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952922076] [2021-12-07 01:11:23,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952922076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:23,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:11:23,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-07 01:11:23,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841588612] [2021-12-07 01:11:23,316 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:11:23,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:11:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:11:23,317 INFO L87 Difference]: Start difference. First operand 222 states and 302 transitions. Second operand has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 01:11:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:25,256 INFO L93 Difference]: Finished difference Result 316 states and 429 transitions. [2021-12-07 01:11:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:11:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 87 [2021-12-07 01:11:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:25,258 INFO L225 Difference]: With dead ends: 316 [2021-12-07 01:11:25,258 INFO L226 Difference]: Without dead ends: 311 [2021-12-07 01:11:25,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:11:25,259 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 73 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:25,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 529 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-07 01:11:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-07 01:11:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 291. [2021-12-07 01:11:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 171 states have internal predecessors, (203), 101 states have call successors, (101), 19 states have call predecessors, (101), 18 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-07 01:11:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 404 transitions. [2021-12-07 01:11:25,323 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 404 transitions. Word has length 87 [2021-12-07 01:11:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:25,324 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 404 transitions. [2021-12-07 01:11:25,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 01:11:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 404 transitions. [2021-12-07 01:11:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-07 01:11:25,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:25,325 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:25,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 01:11:25,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 01:11:25,527 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:25,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2021-12-07 01:11:25,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:25,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506409453] [2021-12-07 01:11:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:25,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:25,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:25,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304120520] [2021-12-07 01:11:25,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:25,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:25,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:25,558 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:25,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 01:11:25,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:11:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-07 01:11:25,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-07 01:11:25,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506409453] [2021-12-07 01:11:25,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304120520] [2021-12-07 01:11:25,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304120520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:25,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:25,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-12-07 01:11:25,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251716572] [2021-12-07 01:11:25,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:25,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 01:11:25,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 01:11:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:11:25,809 INFO L87 Difference]: Start difference. First operand 291 states and 404 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:11:26,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:26,302 INFO L93 Difference]: Finished difference Result 362 states and 501 transitions. [2021-12-07 01:11:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 01:11:26,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2021-12-07 01:11:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:26,305 INFO L225 Difference]: With dead ends: 362 [2021-12-07 01:11:26,305 INFO L226 Difference]: Without dead ends: 357 [2021-12-07 01:11:26,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-12-07 01:11:26,306 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 61 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:26,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 503 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:11:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-07 01:11:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 277. [2021-12-07 01:11:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 161 states have (on average 1.1925465838509317) internal successors, (192), 161 states have internal predecessors, (192), 97 states have call successors, (97), 19 states have call predecessors, (97), 18 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-12-07 01:11:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 385 transitions. [2021-12-07 01:11:26,370 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 385 transitions. Word has length 95 [2021-12-07 01:11:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:26,370 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 385 transitions. [2021-12-07 01:11:26,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 01:11:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 385 transitions. [2021-12-07 01:11:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-07 01:11:26,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:26,372 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:26,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 01:11:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 01:11:26,572 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:26,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash 28846429, now seen corresponding path program 2 times [2021-12-07 01:11:26,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:26,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200074637] [2021-12-07 01:11:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:26,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:26,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:26,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688459801] [2021-12-07 01:11:26,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:26,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:26,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:26,580 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:26,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 01:11:26,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:26,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:26,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-07 01:11:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-07 01:11:27,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 93 proven. 41 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-07 01:11:30,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:30,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200074637] [2021-12-07 01:11:30,087 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:30,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688459801] [2021-12-07 01:11:30,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688459801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:11:30,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:11:30,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2021-12-07 01:11:30,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383868007] [2021-12-07 01:11:30,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:30,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 01:11:30,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 01:11:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:11:30,089 INFO L87 Difference]: Start difference. First operand 277 states and 385 transitions. Second operand has 28 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-12-07 01:11:39,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:11:43,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:11:45,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:11:59,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:02,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:04,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:10,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:12,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:15,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:16,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:19,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:32,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:34,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:37,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:39,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:41,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:43,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:45,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:49,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:51,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:53,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:12:55,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:13:00,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:13:02,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:13:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:13:03,205 INFO L93 Difference]: Finished difference Result 516 states and 745 transitions. [2021-12-07 01:13:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-07 01:13:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 109 [2021-12-07 01:13:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:13:03,209 INFO L225 Difference]: With dead ends: 516 [2021-12-07 01:13:03,209 INFO L226 Difference]: Without dead ends: 510 [2021-12-07 01:13:03,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=1110, Invalid=5532, Unknown=0, NotChecked=0, Total=6642 [2021-12-07 01:13:03,211 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 210 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 637 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:13:03,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 824 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 1994 Invalid, 19 Unknown, 0 Unchecked, 68.3s Time] [2021-12-07 01:13:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-07 01:13:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 388. [2021-12-07 01:13:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 216 states have (on average 1.2222222222222223) internal successors, (264), 216 states have internal predecessors, (264), 149 states have call successors, (149), 23 states have call predecessors, (149), 22 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2021-12-07 01:13:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 561 transitions. [2021-12-07 01:13:03,337 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 561 transitions. Word has length 109 [2021-12-07 01:13:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:13:03,338 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 561 transitions. [2021-12-07 01:13:03,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-12-07 01:13:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 561 transitions. [2021-12-07 01:13:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 01:13:03,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:13:03,339 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:13:03,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 01:13:03,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 01:13:03,541 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:13:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:13:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash -876975624, now seen corresponding path program 3 times [2021-12-07 01:13:03,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:13:03,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121863267] [2021-12-07 01:13:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:13:03,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:13:03,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:13:03,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233019257] [2021-12-07 01:13:03,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:13:03,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:13:03,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:13:03,555 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:13:03,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:13:03,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 01:13:03,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:13:03,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-07 01:13:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:13:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 73 proven. 49 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-07 01:13:04,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:13:05,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:13:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121863267] [2021-12-07 01:13:05,904 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:13:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233019257] [2021-12-07 01:13:05,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233019257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:13:05,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:13:05,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-07 01:13:05,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558309725] [2021-12-07 01:13:05,904 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:13:05,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:13:05,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:13:05,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:13:05,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:13:05,905 INFO L87 Difference]: Start difference. First operand 388 states and 561 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-07 01:13:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:13:07,862 INFO L93 Difference]: Finished difference Result 489 states and 695 transitions. [2021-12-07 01:13:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:13:07,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2021-12-07 01:13:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:13:07,866 INFO L225 Difference]: With dead ends: 489 [2021-12-07 01:13:07,866 INFO L226 Difference]: Without dead ends: 484 [2021-12-07 01:13:07,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-12-07 01:13:07,867 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 78 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 01:13:07,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 587 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 01:13:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-12-07 01:13:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 399. [2021-12-07 01:13:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 225 states have (on average 1.2133333333333334) internal successors, (273), 225 states have internal predecessors, (273), 149 states have call successors, (149), 25 states have call predecessors, (149), 24 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2021-12-07 01:13:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 570 transitions. [2021-12-07 01:13:07,992 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 570 transitions. Word has length 112 [2021-12-07 01:13:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:13:07,993 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 570 transitions. [2021-12-07 01:13:07,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-07 01:13:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 570 transitions. [2021-12-07 01:13:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 01:13:07,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:13:07,994 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:13:08,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 01:13:08,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:13:08,196 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:13:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:13:08,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1746474790, now seen corresponding path program 4 times [2021-12-07 01:13:08,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:13:08,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954581065] [2021-12-07 01:13:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:13:08,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:13:08,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:13:08,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059838329] [2021-12-07 01:13:08,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:13:08,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:13:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:13:08,231 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:13:08,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:13:08,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:13:08,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:13:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-07 01:13:08,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:13:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 75 proven. 84 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-07 01:13:10,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:13:13,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:13:13,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954581065] [2021-12-07 01:13:13,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:13:13,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059838329] [2021-12-07 01:13:13,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059838329] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:13:13,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:13:13,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 01:13:13,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368878308] [2021-12-07 01:13:13,631 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:13:13,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:13:13,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:13:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:13:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:13:13,632 INFO L87 Difference]: Start difference. First operand 399 states and 570 transitions. Second operand has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-07 01:13:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:13:17,330 INFO L93 Difference]: Finished difference Result 567 states and 823 transitions. [2021-12-07 01:13:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:13:17,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 117 [2021-12-07 01:13:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:13:17,334 INFO L225 Difference]: With dead ends: 567 [2021-12-07 01:13:17,334 INFO L226 Difference]: Without dead ends: 562 [2021-12-07 01:13:17,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:13:17,336 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 92 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:13:17,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 935 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1447 Invalid, 0 Unknown, 142 Unchecked, 1.9s Time] [2021-12-07 01:13:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-07 01:13:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 419. [2021-12-07 01:13:17,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 237 states have (on average 1.2109704641350212) internal successors, (287), 237 states have internal predecessors, (287), 157 states have call successors, (157), 25 states have call predecessors, (157), 24 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2021-12-07 01:13:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 600 transitions. [2021-12-07 01:13:17,485 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 600 transitions. Word has length 117 [2021-12-07 01:13:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:13:17,485 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 600 transitions. [2021-12-07 01:13:17,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-07 01:13:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 600 transitions. [2021-12-07 01:13:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-07 01:13:17,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:13:17,487 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:13:17,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:13:17,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:13:17,688 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:13:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:13:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash -693232369, now seen corresponding path program 5 times [2021-12-07 01:13:17,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:13:17,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340786383] [2021-12-07 01:13:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:13:17,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:13:17,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:13:17,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332565760] [2021-12-07 01:13:17,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:13:17,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:13:17,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:13:17,724 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:13:17,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:13:17,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-07 01:13:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:13:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-07 01:13:17,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:13:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 58 proven. 75 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 01:13:20,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:13:27,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:13:27,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340786383] [2021-12-07 01:13:27,791 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:13:27,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332565760] [2021-12-07 01:13:27,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332565760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:13:27,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:13:27,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 01:13:27,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951388205] [2021-12-07 01:13:27,791 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:13:27,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:13:27,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:13:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:13:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=970, Unknown=1, NotChecked=0, Total=1122 [2021-12-07 01:13:27,792 INFO L87 Difference]: Start difference. First operand 419 states and 600 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 01:13:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:13:30,548 INFO L93 Difference]: Finished difference Result 612 states and 889 transitions. [2021-12-07 01:13:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:13:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 134 [2021-12-07 01:13:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:13:30,552 INFO L225 Difference]: With dead ends: 612 [2021-12-07 01:13:30,552 INFO L226 Difference]: Without dead ends: 607 [2021-12-07 01:13:30,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=307, Invalid=1948, Unknown=1, NotChecked=0, Total=2256 [2021-12-07 01:13:30,553 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 91 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:13:30,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 779 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-07 01:13:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-12-07 01:13:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 581. [2021-12-07 01:13:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 318 states have (on average 1.2358490566037736) internal successors, (393), 318 states have internal predecessors, (393), 233 states have call successors, (233), 30 states have call predecessors, (233), 29 states have return successors, (232), 232 states have call predecessors, (232), 232 states have call successors, (232) [2021-12-07 01:13:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 858 transitions. [2021-12-07 01:13:30,774 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 858 transitions. Word has length 134 [2021-12-07 01:13:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:13:30,774 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 858 transitions. [2021-12-07 01:13:30,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 01:13:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 858 transitions. [2021-12-07 01:13:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-07 01:13:30,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:13:30,776 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:13:30,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-07 01:13:30,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:13:30,977 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:13:30,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:13:30,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1814649351, now seen corresponding path program 6 times [2021-12-07 01:13:30,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:13:30,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332748083] [2021-12-07 01:13:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:13:30,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:13:31,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:13:31,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374536205] [2021-12-07 01:13:31,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:13:31,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:13:31,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:13:31,008 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:13:31,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:13:32,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-07 01:13:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:13:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-07 01:13:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:13:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 149 proven. 79 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-12-07 01:13:35,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:13:42,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:13:42,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332748083] [2021-12-07 01:13:42,155 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:13:42,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374536205] [2021-12-07 01:13:42,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374536205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:13:42,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:13:42,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-07 01:13:42,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503687458] [2021-12-07 01:13:42,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:13:42,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:13:42,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:13:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:13:42,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-12-07 01:13:42,157 INFO L87 Difference]: Start difference. First operand 581 states and 858 transitions. Second operand has 22 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-07 01:14:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:14:10,902 INFO L93 Difference]: Finished difference Result 873 states and 1307 transitions. [2021-12-07 01:14:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-07 01:14:10,903 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 139 [2021-12-07 01:14:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:14:10,907 INFO L225 Difference]: With dead ends: 873 [2021-12-07 01:14:10,908 INFO L226 Difference]: Without dead ends: 868 [2021-12-07 01:14:10,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=553, Invalid=2527, Unknown=0, NotChecked=0, Total=3080 [2021-12-07 01:14:10,909 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 191 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:14:10,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 392 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-07 01:14:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-12-07 01:14:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 672. [2021-12-07 01:14:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 363 states have (on average 1.2479338842975207) internal successors, (453), 364 states have internal predecessors, (453), 275 states have call successors, (275), 34 states have call predecessors, (275), 33 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) [2021-12-07 01:14:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1002 transitions. [2021-12-07 01:14:11,190 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1002 transitions. Word has length 139 [2021-12-07 01:14:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:14:11,190 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1002 transitions. [2021-12-07 01:14:11,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.45) internal successors, (49), 18 states have internal predecessors, (49), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-12-07 01:14:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1002 transitions. [2021-12-07 01:14:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-07 01:14:11,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:14:11,192 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:14:11,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 01:14:11,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:14:11,393 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:14:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:14:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1917326542, now seen corresponding path program 7 times [2021-12-07 01:14:11,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:14:11,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369448566] [2021-12-07 01:14:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:14:11,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:14:11,399 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:14:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002795580] [2021-12-07 01:14:11,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:14:11,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:14:11,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:14:11,400 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:14:11,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 01:14:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:14:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-07 01:14:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:14:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 70 proven. 91 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 01:14:12,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:14:16,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:14:16,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369448566] [2021-12-07 01:14:16,094 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:14:16,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002795580] [2021-12-07 01:14:16,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002795580] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:14:16,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:14:16,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-07 01:14:16,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432833337] [2021-12-07 01:14:16,095 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:14:16,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:14:16,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:14:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:14:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:14:16,096 INFO L87 Difference]: Start difference. First operand 672 states and 1002 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 01:14:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:14:18,293 INFO L93 Difference]: Finished difference Result 881 states and 1300 transitions. [2021-12-07 01:14:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:14:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 142 [2021-12-07 01:14:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:14:18,299 INFO L225 Difference]: With dead ends: 881 [2021-12-07 01:14:18,299 INFO L226 Difference]: Without dead ends: 876 [2021-12-07 01:14:18,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:14:18,300 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 102 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:14:18,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 918 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-07 01:14:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-12-07 01:14:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 842. [2021-12-07 01:14:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 454 states have (on average 1.251101321585903) internal successors, (568), 455 states have internal predecessors, (568), 347 states have call successors, (347), 41 states have call predecessors, (347), 40 states have return successors, (346), 345 states have call predecessors, (346), 346 states have call successors, (346) [2021-12-07 01:14:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1261 transitions. [2021-12-07 01:14:18,690 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1261 transitions. Word has length 142 [2021-12-07 01:14:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:14:18,690 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1261 transitions. [2021-12-07 01:14:18,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 01:14:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1261 transitions. [2021-12-07 01:14:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-07 01:14:18,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:14:18,693 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:14:18,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 01:14:18,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 01:14:18,894 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:14:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:14:18,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1166399926, now seen corresponding path program 8 times [2021-12-07 01:14:18,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:14:18,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121038917] [2021-12-07 01:14:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:14:18,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:14:18,921 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:14:18,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836467186] [2021-12-07 01:14:18,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:14:18,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:14:18,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:14:18,922 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:14:18,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4b30299-9c0a-446f-95c8-a6fde4ab3c1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:14:18,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:14:18,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:14:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-07 01:14:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates...