./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF --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 aad83614f5b3454ec30b386336992d9fee88422d967149e7e88efe6256830f00 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:34:23,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:34:23,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:34:23,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:34:23,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:34:23,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:34:23,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:34:23,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:34:23,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:34:23,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:34:23,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:34:23,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:34:23,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:34:23,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:34:23,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:34:23,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:34:23,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:34:23,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:34:23,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:34:23,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:34:23,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:34:23,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:34:23,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:34:23,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:34:23,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:34:23,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:34:23,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:34:23,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:34:23,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:34:23,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:34:23,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:34:23,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:34:23,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:34:23,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:34:23,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:34:23,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:34:23,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:34:23,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:34:23,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:34:23,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:34:23,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:34:23,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:34:23,246 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:34:23,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:34:23,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:34:23,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:34:23,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:34:23,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:34:23,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:34:23,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:34:23,255 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:34:23,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:34:23,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:34:23,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:34:23,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:34:23,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:34:23,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:34:23,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:34:23,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:34:23,257 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:34:23,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:34:23,257 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:34:23,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:34:23,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:34:23,258 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:34:23,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:34:23,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:34:23,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:34:23,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:34:23,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:34:23,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:34:23,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:34:23,259 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:34:23,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:34:23,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:34:23,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:34:23,260 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_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aad83614f5b3454ec30b386336992d9fee88422d967149e7e88efe6256830f00 [2021-11-20 05:34:23,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:34:23,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:34:23,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:34:23,615 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:34:23,615 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:34:23,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-11-20 05:34:23,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/data/4a9f1269a/17e5c7158c7e42459549edfd1526af86/FLAGd9f699fba [2021-11-20 05:34:24,194 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:34:24,195 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-11-20 05:34:24,206 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/data/4a9f1269a/17e5c7158c7e42459549edfd1526af86/FLAGd9f699fba [2021-11-20 05:34:24,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/data/4a9f1269a/17e5c7158c7e42459549edfd1526af86 [2021-11-20 05:34:24,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:34:24,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:34:24,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:34:24,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:34:24,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:34:24,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47992710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24, skipping insertion in model container [2021-11-20 05:34:24,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:34:24,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:34:24,767 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_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-11-20 05:34:24,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:34:24,789 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:34:24,801 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_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c[573,586] [2021-11-20 05:34:24,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:34:24,820 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:34:24,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24 WrapperNode [2021-11-20 05:34:24,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:34:24,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:34:24,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:34:24,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:34:24,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,852 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-11-20 05:34:24,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:34:24,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:34:24,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:34:24,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:34:24,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:34:24,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:34:24,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:34:24,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:34:24,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (1/1) ... [2021-11-20 05:34:24,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:34:24,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:24,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:34:24,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:34:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:34:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 05:34:24,979 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 05:34:24,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:34:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:34:24,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:34:24,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:34:24,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:34:25,049 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:34:25,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:34:25,209 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:34:25,215 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:34:25,215 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 05:34:25,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:25 BoogieIcfgContainer [2021-11-20 05:34:25,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:34:25,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:34:25,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:34:25,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:34:25,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:34:24" (1/3) ... [2021-11-20 05:34:25,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483953cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:34:25, skipping insertion in model container [2021-11-20 05:34:25,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:34:24" (2/3) ... [2021-11-20 05:34:25,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483953cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:34:25, skipping insertion in model container [2021-11-20 05:34:25,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:25" (3/3) ... [2021-11-20 05:34:25,225 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2021-11-20 05:34:25,230 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:34:25,230 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:34:25,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:34:25,291 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 [2021-11-20 05:34:25,291 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:34:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 05:34:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:34:25,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:25,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:25,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2021-11-20 05:34:25,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:25,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439927795] [2021-11-20 05:34:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:25,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 05:34:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 05:34:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:34:25,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:25,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439927795] [2021-11-20 05:34:25,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439927795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:25,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:25,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:34:25,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138745628] [2021-11-20 05:34:25,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:25,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:34:25,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:25,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:34:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:34:25,628 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:34:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:25,651 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-11-20 05:34:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:34:25,654 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 05:34:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:25,662 INFO L225 Difference]: With dead ends: 47 [2021-11-20 05:34:25,662 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 05:34:25,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:34:25,678 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:25,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 05:34:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-20 05:34:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:34:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-20 05:34:25,722 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2021-11-20 05:34:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:25,723 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-20 05:34:25,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:34:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-20 05:34:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:34:25,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:25,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:25,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:34:25,735 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:25,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2021-11-20 05:34:25,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:25,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264170426] [2021-11-20 05:34:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:25,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:25,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:25,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834909414] [2021-11-20 05:34:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:25,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:25,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:25,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:25,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:34:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:34:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:34:25,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:25,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264170426] [2021-11-20 05:34:25,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834909414] [2021-11-20 05:34:25,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834909414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:25,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:25,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:34:25,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409009453] [2021-11-20 05:34:25,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:25,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:34:25,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:34:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:25,969 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:34:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:25,984 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-20 05:34:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:34:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 05:34:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:25,996 INFO L225 Difference]: With dead ends: 30 [2021-11-20 05:34:25,996 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 05:34:25,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:34:25,998 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:25,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 05:34:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 05:34:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:34:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-20 05:34:26,006 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2021-11-20 05:34:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:26,008 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-20 05:34:26,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:34:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-20 05:34:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:34:26,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:26,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:26,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:26,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:26,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2021-11-20 05:34:26,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:26,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057139164] [2021-11-20 05:34:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:26,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:26,244 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:26,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061307162] [2021-11-20 05:34:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:26,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:26,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:26,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:34:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:26,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:34:26,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:34:26,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:34:26,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057139164] [2021-11-20 05:34:26,637 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061307162] [2021-11-20 05:34:26,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061307162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:34:26,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:34:26,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 05:34:26,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223025921] [2021-11-20 05:34:26,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:34:26,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:34:26,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:26,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:34:26,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:34:26,641 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:34:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:26,767 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-20 05:34:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:34:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 05:34:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:26,770 INFO L225 Difference]: With dead ends: 33 [2021-11-20 05:34:26,772 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 05:34:26,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:34:26,775 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:26,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:34:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 05:34:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-20 05:34:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 05:34:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-20 05:34:26,790 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2021-11-20 05:34:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:26,791 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-20 05:34:26,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:34:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-20 05:34:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:34:26,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:26,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:26,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 05:34:27,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:27,024 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:27,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2021-11-20 05:34:27,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:27,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532942944] [2021-11-20 05:34:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:27,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:27,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:27,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617653601] [2021-11-20 05:34:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:27,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:27,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:27,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:27,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:34:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:27,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:34:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:34:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:34:27,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532942944] [2021-11-20 05:34:27,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617653601] [2021-11-20 05:34:27,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617653601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:27,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:27,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-20 05:34:27,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416229384] [2021-11-20 05:34:27,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:27,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:34:27,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:34:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:34:27,570 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 05:34:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:27,665 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-11-20 05:34:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:34:27,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2021-11-20 05:34:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:27,669 INFO L225 Difference]: With dead ends: 35 [2021-11-20 05:34:27,670 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 05:34:27,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:34:27,675 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:27,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:34:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 05:34:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-11-20 05:34:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:34:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-20 05:34:27,692 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2021-11-20 05:34:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:27,695 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-20 05:34:27,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 05:34:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-20 05:34:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:34:27,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:27,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:27,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:27,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:27,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2021-11-20 05:34:27,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192025177] [2021-11-20 05:34:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:27,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:27,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:27,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843719224] [2021-11-20 05:34:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:27,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:27,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:27,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:27,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:34:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:34:27,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:34:27,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:34:28,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:34:28,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:28,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192025177] [2021-11-20 05:34:28,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:28,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843719224] [2021-11-20 05:34:28,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843719224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:28,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:28,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-20 05:34:28,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836149710] [2021-11-20 05:34:28,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:28,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:34:28,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:28,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:34:28,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:34:28,163 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:34:28,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:28,232 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-11-20 05:34:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:34:28,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2021-11-20 05:34:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:28,234 INFO L225 Difference]: With dead ends: 57 [2021-11-20 05:34:28,234 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 05:34:28,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:34:28,236 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:28,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 93 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 05:34:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-20 05:34:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 05:34:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-11-20 05:34:28,247 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2021-11-20 05:34:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:28,247 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-11-20 05:34:28,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 05:34:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-11-20 05:34:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 05:34:28,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:28,250 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:28,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 05:34:28,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:28,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash 972990450, now seen corresponding path program 2 times [2021-11-20 05:34:28,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:28,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004383488] [2021-11-20 05:34:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:28,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:28,480 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:28,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008696599] [2021-11-20 05:34:28,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:34:28,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:28,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:28,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:28,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:34:28,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:34:28,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:34:28,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:34:28,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:34:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 05:34:28,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:34:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 05:34:28,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:34:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004383488] [2021-11-20 05:34:28,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:34:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008696599] [2021-11-20 05:34:28,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008696599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:34:28,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:34:28,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-11-20 05:34:28,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452236827] [2021-11-20 05:34:28,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:34:28,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:34:28,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:34:28,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:34:28,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:34:28,853 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 6 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 05:34:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:34:28,938 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-11-20 05:34:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 05:34:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 6 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 55 [2021-11-20 05:34:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:34:28,941 INFO L225 Difference]: With dead ends: 66 [2021-11-20 05:34:28,941 INFO L226 Difference]: Without dead ends: 61 [2021-11-20 05:34:28,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:34:28,946 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:34:28,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 91 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:34:28,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-20 05:34:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-20 05:34:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 05:34:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-11-20 05:34:28,971 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 55 [2021-11-20 05:34:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:34:28,972 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-11-20 05:34:28,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 6 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 05:34:28,972 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-11-20 05:34:28,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 05:34:28,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:34:28,974 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:34:28,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:29,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:29,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:34:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:34:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -611143683, now seen corresponding path program 3 times [2021-11-20 05:34:29,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:34:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434999272] [2021-11-20 05:34:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:34:29,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:34:29,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:34:29,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051645309] [2021-11-20 05:34:29,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:34:29,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:34:29,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:34:29,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:34:29,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:34:29,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 05:34:29,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-20 05:34:29,277 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 05:34:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 05:34:29,325 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 05:34:29,326 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 05:34:29,327 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 05:34:29,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:34:29,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:34:29,544 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2021-11-20 05:34:29,547 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 05:34:29,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:34:29 BoogieIcfgContainer [2021-11-20 05:34:29,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 05:34:29,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 05:34:29,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 05:34:29,592 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 05:34:29,593 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:34:25" (3/4) ... [2021-11-20 05:34:29,594 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 05:34:29,706 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 05:34:29,706 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 05:34:29,707 INFO L158 Benchmark]: Toolchain (without parser) took 5145.15ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 70.9MB in the beginning and 93.0MB in the end (delta: -22.1MB). Peak memory consumption was 837.6kB. Max. memory is 16.1GB. [2021-11-20 05:34:29,708 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 107.0MB. Free memory was 80.2MB in the beginning and 80.2MB in the end (delta: 30.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:34:29,708 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.48ms. Allocated memory is still 107.0MB. Free memory was 70.6MB in the beginning and 80.5MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:34:29,708 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.31ms. Allocated memory is still 107.0MB. Free memory was 80.5MB in the beginning and 79.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:34:29,709 INFO L158 Benchmark]: Boogie Preprocessor took 20.74ms. Allocated memory is still 107.0MB. Free memory was 79.3MB in the beginning and 78.4MB in the end (delta: 866.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 05:34:29,709 INFO L158 Benchmark]: RCFGBuilder took 342.36ms. Allocated memory is still 107.0MB. Free memory was 77.9MB in the beginning and 68.5MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 05:34:29,709 INFO L158 Benchmark]: TraceAbstraction took 4372.26ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 67.9MB in the beginning and 96.1MB in the end (delta: -28.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:34:29,710 INFO L158 Benchmark]: Witness Printer took 114.80ms. Allocated memory is still 130.0MB. Free memory was 96.1MB in the beginning and 93.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 05:34:29,713 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 107.0MB. Free memory was 80.2MB in the beginning and 80.2MB in the end (delta: 30.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 257.48ms. Allocated memory is still 107.0MB. Free memory was 70.6MB in the beginning and 80.5MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.31ms. Allocated memory is still 107.0MB. Free memory was 80.5MB in the beginning and 79.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.74ms. Allocated memory is still 107.0MB. Free memory was 79.3MB in the beginning and 78.4MB in the end (delta: 866.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 342.36ms. Allocated memory is still 107.0MB. Free memory was 77.9MB in the beginning and 68.5MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4372.26ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 67.9MB in the beginning and 96.1MB in the end (delta: -28.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 114.80ms. Allocated memory is still 130.0MB. Free memory was 96.1MB in the beginning and 93.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [counter=0, x1=6, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [counter=0, x1=6, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0, x1=6, x2=1, y1=0, y2=0, y3=6] [L36] EXPR counter++ VAL [counter=1, counter++=0, x1=6, x2=1, y1=0, y2=0, y3=6] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=1, x1=6, x2=1, y1=0, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1, x1=6, x2=1, y1=0, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1, x1=6, x2=1, y1=1, y2=0, y3=5] [L36] EXPR counter++ VAL [counter=2, counter++=1, x1=6, x2=1, y1=1, y2=0, y3=5] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=2, x1=6, x2=1, y1=1, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2, x1=6, x2=1, y1=1, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2, x1=6, x2=1, y1=2, y2=0, y3=4] [L36] EXPR counter++ VAL [counter=3, counter++=2, x1=6, x2=1, y1=2, y2=0, y3=4] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=3, x1=6, x2=1, y1=2, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3, x1=6, x2=1, y1=2, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3, x1=6, x2=1, y1=3, y2=0, y3=3] [L36] EXPR counter++ VAL [counter=4, counter++=3, x1=6, x2=1, y1=3, y2=0, y3=3] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=4, x1=6, x2=1, y1=3, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4, x1=6, x2=1, y1=3, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4, x1=6, x2=1, y1=4, y2=0, y3=2] [L36] EXPR counter++ VAL [counter=5, counter++=4, x1=6, x2=1, y1=4, y2=0, y3=2] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=5, x1=6, x2=1, y1=4, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5, x1=6, x2=1, y1=4, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5, x1=6, x2=1, y1=5, y2=0, y3=1] [L36] EXPR counter++ VAL [counter=6, counter++=5, x1=6, x2=1, y1=5, y2=0, y3=1] [L36] COND FALSE !(counter++<5) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, counter=6] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L18] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.3s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 94 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 91 mSDsluCounter, 443 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 307 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 171 IncrementalHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 136 mSDtfsCounter, 171 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=6, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 263 ConstructedInterpolants, 0 QuantifiedInterpolants, 673 SizeOfPredicates, 15 NumberOfNonLiveVariables, 471 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 82/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 05:34:29,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0f7d6fc-4a1e-47d9-9a6d-e29ff0d39645/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE