./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN --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 a8eb1c4cff73de825c0246f8cf2782e4a89e8227445b840b0a85ffef021d29c3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:05:47,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:05:47,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:05:47,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:05:47,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:05:47,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:05:47,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:05:47,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:05:47,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:05:47,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:05:47,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:05:47,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:05:47,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:05:47,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:05:47,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:05:47,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:05:47,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:05:47,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:05:47,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:05:47,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:05:47,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:05:47,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:05:47,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:05:47,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:05:47,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:05:47,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:05:47,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:05:47,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:05:47,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:05:47,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:05:47,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:05:47,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:05:47,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:05:47,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:05:47,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:05:47,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:05:47,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:05:47,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:05:47,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:05:47,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:05:47,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:05:47,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:05:47,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:05:47,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:05:47,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:05:47,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:05:47,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:05:47,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:05:47,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:05:47,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:05:47,246 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:05:47,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:05:47,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:05:47,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:05:47,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:05:47,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:05:47,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:05:47,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:05:47,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:05:47,248 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:05:47,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:05:47,249 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:05:47,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:05:47,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:05:47,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:05:47,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:05:47,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:05:47,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:05:47,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:05:47,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:05:47,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:05:47,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:05:47,252 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:05:47,252 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:05:47,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:05:47,253 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_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8eb1c4cff73de825c0246f8cf2782e4a89e8227445b840b0a85ffef021d29c3 [2022-11-20 12:05:47,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:05:47,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:05:47,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:05:47,581 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:05:47,583 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:05:47,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2022-11-20 12:05:50,609 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:05:50,821 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:05:50,822 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2022-11-20 12:05:50,829 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/data/6e7f1b83f/d5d477b0a80a4cbd8c35f9b30344b4b9/FLAG0ad67594a [2022-11-20 12:05:50,855 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/data/6e7f1b83f/d5d477b0a80a4cbd8c35f9b30344b4b9 [2022-11-20 12:05:50,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:05:50,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:05:50,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:05:50,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:05:50,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:05:50,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:05:50" (1/1) ... [2022-11-20 12:05:50,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314535f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:50, skipping insertion in model container [2022-11-20 12:05:50,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:05:50" (1/1) ... [2022-11-20 12:05:50,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:05:50,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:05:51,043 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c[524,537] [2022-11-20 12:05:51,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:05:51,080 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:05:51,093 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound5.c[524,537] [2022-11-20 12:05:51,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:05:51,119 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:05:51,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51 WrapperNode [2022-11-20 12:05:51,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:05:51,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:05:51,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:05:51,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:05:51,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,157 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2022-11-20 12:05:51,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:05:51,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:05:51,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:05:51,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:05:51,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:05:51,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:05:51,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:05:51,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:05:51,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (1/1) ... [2022-11-20 12:05:51,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:05:51,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:51,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:05:51,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:05:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:05:51,295 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 12:05:51,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 12:05:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:05:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:05:51,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:05:51,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 12:05:51,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 12:05:51,372 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:05:51,379 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:05:51,593 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:05:51,599 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:05:51,600 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 12:05:51,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:05:51 BoogieIcfgContainer [2022-11-20 12:05:51,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:05:51,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:05:51,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:05:51,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:05:51,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:05:50" (1/3) ... [2022-11-20 12:05:51,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccf7ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:05:51, skipping insertion in model container [2022-11-20 12:05:51,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:05:51" (2/3) ... [2022-11-20 12:05:51,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccf7ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:05:51, skipping insertion in model container [2022-11-20 12:05:51,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:05:51" (3/3) ... [2022-11-20 12:05:51,616 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound5.c [2022-11-20 12:05:51,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:05:51,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:05:51,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:05:51,774 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6f2c50ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:05:51,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:05:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:05:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 12:05:51,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:51,789 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:51,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:51,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2022-11-20 12:05:51,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38569526] [2022-11-20 12:05:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:51,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:51,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:51,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561585703] [2022-11-20 12:05:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:51,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:51,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:51,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:51,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:05:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:52,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 12:05:52,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:05:52,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:05:52,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38569526] [2022-11-20 12:05:52,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:05:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561585703] [2022-11-20 12:05:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561585703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:52,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:52,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:05:52,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111432928] [2022-11-20 12:05:52,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:52,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:05:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:52,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:05:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:05:52,220 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:05:52,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:52,244 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-11-20 12:05:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:05:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-20 12:05:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:52,259 INFO L225 Difference]: With dead ends: 47 [2022-11-20 12:05:52,259 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 12:05:52,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:05:52,269 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:52,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:05:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 12:05:52,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-20 12:05:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:05:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-20 12:05:52,312 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2022-11-20 12:05:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:52,312 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-20 12:05:52,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:05:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-20 12:05:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 12:05:52,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:52,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:52,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:52,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 12:05:52,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:52,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2022-11-20 12:05:52,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:52,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034430936] [2022-11-20 12:05:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:52,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:52,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:52,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464553675] [2022-11-20 12:05:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:52,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:52,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:52,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:52,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:05:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:52,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:05:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:05:52,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:05:52,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:52,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034430936] [2022-11-20 12:05:52,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:05:52,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464553675] [2022-11-20 12:05:52,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464553675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:52,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:52,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:05:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333019318] [2022-11-20 12:05:52,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:52,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:05:52,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:05:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:05:52,737 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:05:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:52,766 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-20 12:05:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:05:52,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-20 12:05:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:52,778 INFO L225 Difference]: With dead ends: 30 [2022-11-20 12:05:52,778 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 12:05:52,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:05:52,780 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:52,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:05:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 12:05:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-20 12:05:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:05:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-20 12:05:52,794 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2022-11-20 12:05:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:52,795 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-20 12:05:52,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:05:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-20 12:05:52,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 12:05:52,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:52,797 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:52,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 12:05:53,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2022-11-20 12:05:53,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:53,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091059092] [2022-11-20 12:05:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:53,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:53,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:53,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479812888] [2022-11-20 12:05:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:53,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:53,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:53,021 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:53,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:05:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:53,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 12:05:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:05:53,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:05:53,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091059092] [2022-11-20 12:05:53,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:05:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479812888] [2022-11-20 12:05:53,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479812888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:05:53,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:05:53,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:05:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464602891] [2022-11-20 12:05:53,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:05:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:05:53,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:05:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:05:53,329 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:05:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:53,856 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-20 12:05:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:05:53,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-20 12:05:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:53,858 INFO L225 Difference]: With dead ends: 35 [2022-11-20 12:05:53,858 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 12:05:53,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:05:53,860 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:53,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 79 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:05:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 12:05:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-20 12:05:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:05:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-20 12:05:53,873 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2022-11-20 12:05:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:53,876 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-20 12:05:53,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:05:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-20 12:05:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 12:05:53,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:53,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:53,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:54,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:54,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2022-11-20 12:05:54,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:54,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989439446] [2022-11-20 12:05:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:54,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:54,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917092684] [2022-11-20 12:05:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:54,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:54,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:54,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:54,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:05:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:54,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:05:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:05:54,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:05:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:05:54,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:54,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989439446] [2022-11-20 12:05:54,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:05:54,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917092684] [2022-11-20 12:05:54,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917092684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:05:54,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:05:54,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-20 12:05:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418997311] [2022-11-20 12:05:54,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:05:54,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:05:54,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:05:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:05:54,541 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 12:05:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:54,731 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-20 12:05:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:05:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-11-20 12:05:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:54,740 INFO L225 Difference]: With dead ends: 39 [2022-11-20 12:05:54,740 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 12:05:54,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:05:54,746 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:54,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 85 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:05:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 12:05:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-11-20 12:05:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:05:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-20 12:05:54,768 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2022-11-20 12:05:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:54,770 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-20 12:05:54,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 12:05:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-20 12:05:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:05:54,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:54,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:05:54,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:54,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:54,979 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2022-11-20 12:05:54,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:54,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729999528] [2022-11-20 12:05:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:54,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:54,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213646417] [2022-11-20 12:05:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:54,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:54,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:55,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:05:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:05:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 12:05:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:05:55,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:05:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:05:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:55,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729999528] [2022-11-20 12:05:55,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:05:55,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213646417] [2022-11-20 12:05:55,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213646417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:05:55,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:05:55,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-20 12:05:55,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392248798] [2022-11-20 12:05:55,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:05:55,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:05:55,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:05:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:05:55,164 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) [2022-11-20 12:05:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:55,248 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-11-20 12:05:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:05:55,249 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 [2022-11-20 12:05:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:55,250 INFO L225 Difference]: With dead ends: 57 [2022-11-20 12:05:55,250 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 12:05:55,251 INFO L412 NwaCegarLoop]: 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 [2022-11-20 12:05:55,252 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:55,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 101 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:05:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 12:05:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-20 12:05:55,271 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) [2022-11-20 12:05:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-11-20 12:05:55,272 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2022-11-20 12:05:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:55,273 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-11-20 12:05:55,273 INFO L496 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) [2022-11-20 12:05:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-11-20 12:05:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 12:05:55,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:55,275 INFO L195 NwaCegarLoop]: 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] [2022-11-20 12:05:55,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:55,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:55,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash 972990450, now seen corresponding path program 2 times [2022-11-20 12:05:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:55,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265202295] [2022-11-20 12:05:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:55,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:55,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047800796] [2022-11-20 12:05:55,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:05:55,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:55,514 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:55,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:05:55,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:05:55,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:05:55,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:05:55,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:05:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:05:55,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:05:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 12:05:55,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:05:55,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265202295] [2022-11-20 12:05:55,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 12:05:55,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047800796] [2022-11-20 12:05:55,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047800796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:05:55,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:05:55,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2022-11-20 12:05:55,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019368947] [2022-11-20 12:05:55,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 12:05:55,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:05:55,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:05:55,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:05:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:05:55,832 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) [2022-11-20 12:05:55,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:05:55,943 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-11-20 12:05:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:05:55,944 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 [2022-11-20 12:05:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:05:55,945 INFO L225 Difference]: With dead ends: 66 [2022-11-20 12:05:55,945 INFO L226 Difference]: Without dead ends: 61 [2022-11-20 12:05:55,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:05:55,947 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:05:55,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:05:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-20 12:05:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-20 12:05:55,966 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) [2022-11-20 12:05:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-11-20 12:05:55,967 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 55 [2022-11-20 12:05:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:05:55,968 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-11-20 12:05:55,968 INFO L496 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) [2022-11-20 12:05:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-11-20 12:05:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 12:05:55,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:05:55,970 INFO L195 NwaCegarLoop]: 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] [2022-11-20 12:05:55,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:05:56,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 12:05:56,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:05:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:05:56,176 INFO L85 PathProgramCache]: Analyzing trace with hash -611143683, now seen corresponding path program 3 times [2022-11-20 12:05:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:05:56,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622281069] [2022-11-20 12:05:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:05:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:05:56,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 12:05:56,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35858372] [2022-11-20 12:05:56,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:05:56,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:05:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:05:56,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:05:56,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:05:58,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 12:05:58,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-20 12:05:58,595 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:05:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:05:59,867 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:05:59,868 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:05:59,869 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 12:05:59,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:06:00,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:06:00,081 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2022-11-20 12:06:00,084 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 12:06:00,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:06:00 BoogieIcfgContainer [2022-11-20 12:06:00,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 12:06:00,128 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 12:06:00,128 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 12:06:00,129 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 12:06:00,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:05:51" (3/4) ... [2022-11-20 12:06:00,131 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 12:06:00,193 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 12:06:00,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 12:06:00,194 INFO L158 Benchmark]: Toolchain (without parser) took 9332.72ms. Allocated memory is still 197.1MB. Free memory was 156.0MB in the beginning and 87.1MB in the end (delta: 68.9MB). Peak memory consumption was 70.6MB. Max. memory is 16.1GB. [2022-11-20 12:06:00,194 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 88.1MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:06:00,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.68ms. Allocated memory is still 197.1MB. Free memory was 156.0MB in the beginning and 145.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 12:06:00,195 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.72ms. Allocated memory is still 197.1MB. Free memory was 145.5MB in the beginning and 144.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:06:00,195 INFO L158 Benchmark]: Boogie Preprocessor took 33.49ms. Allocated memory is still 197.1MB. Free memory was 144.3MB in the beginning and 143.4MB in the end (delta: 881.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 12:06:00,196 INFO L158 Benchmark]: RCFGBuilder took 410.17ms. Allocated memory is still 197.1MB. Free memory was 142.8MB in the beginning and 132.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 12:06:00,196 INFO L158 Benchmark]: TraceAbstraction took 8523.38ms. Allocated memory is still 197.1MB. Free memory was 131.7MB in the beginning and 90.2MB in the end (delta: 41.5MB). Peak memory consumption was 43.3MB. Max. memory is 16.1GB. [2022-11-20 12:06:00,196 INFO L158 Benchmark]: Witness Printer took 65.07ms. Allocated memory is still 197.1MB. Free memory was 90.2MB in the beginning and 87.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 12:06:00,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 88.1MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.68ms. Allocated memory is still 197.1MB. Free memory was 156.0MB in the beginning and 145.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.72ms. Allocated memory is still 197.1MB. Free memory was 145.5MB in the beginning and 144.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.49ms. Allocated memory is still 197.1MB. Free memory was 144.3MB in the beginning and 143.4MB in the end (delta: 881.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 410.17ms. Allocated memory is still 197.1MB. Free memory was 142.8MB in the beginning and 132.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8523.38ms. Allocated memory is still 197.1MB. Free memory was 131.7MB in the beginning and 90.2MB in the end (delta: 41.5MB). Peak memory consumption was 43.3MB. Max. memory is 16.1GB. * Witness Printer took 65.07ms. Allocated memory is still 197.1MB. Free memory was 90.2MB in the beginning and 87.1MB 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: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [A=173, counter=0, R=14] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [A=173, counter=0, R=14] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [A=173, counter=0, R=14, r=23, u=29, v=1] [L34] EXPR counter++ VAL [A=173, counter=1, counter++=0, r=23, R=14, u=29, v=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=173, counter=1, r=23, R=14, u=29, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=173, counter=1, R=14, r=23, u=29, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [A=173, counter=1, R=14, r=22, u=29, v=3] [L34] EXPR counter++ VAL [A=173, counter=2, counter++=1, R=14, r=22, u=29, v=3] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=173, counter=2, R=14, r=22, u=29, v=3] [L36] COND FALSE !(!(r != 0)) VAL [A=173, counter=2, r=22, R=14, u=29, v=3] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [A=173, counter=2, R=14, r=19, u=29, v=5] [L34] EXPR counter++ VAL [A=173, counter=3, counter++=2, R=14, r=19, u=29, v=5] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=173, counter=3, r=19, R=14, u=29, v=5] [L36] COND FALSE !(!(r != 0)) VAL [A=173, counter=3, R=14, r=19, u=29, v=5] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [A=173, counter=3, R=14, r=14, u=29, v=7] [L34] EXPR counter++ VAL [A=173, counter=4, counter++=3, R=14, r=14, u=29, v=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=173, counter=4, r=14, R=14, u=29, v=7] [L36] COND FALSE !(!(r != 0)) VAL [A=173, counter=4, R=14, r=14, u=29, v=7] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [A=173, counter=4, R=14, r=7, u=29, v=9] [L34] EXPR counter++ VAL [A=173, counter=5, counter++=4, R=14, r=7, u=29, v=9] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=173, counter=5, R=14, r=7, u=29, v=9] [L36] COND FALSE !(!(r != 0)) VAL [A=173, counter=5, R=14, r=7, u=29, v=9] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [A=173, counter=5, R=14, r=-2, u=29, v=11] [L34] EXPR counter++ VAL [A=173, counter=6, counter++=5, R=14, r=-2, u=29, v=11] [L34] COND FALSE !(counter++<5) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L14] 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: 8.4s, OverallIterations: 7, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 113 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 111 mSDsluCounter, 442 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 306 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 207 IncrementalHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 136 mSDtfsCounter, 207 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 275 GetRequests, 228 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=6, InterpolantAutomatonStates: 44, 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, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 263 ConstructedInterpolants, 0 QuantifiedInterpolants, 737 SizeOfPredicates, 15 NumberOfNonLiveVariables, 521 ConjunctsInSsa, 50 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! [2022-11-20 12:06:00,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd031c87-8d01-4c03-af2b-c2396571cd61/bin/uautomizer-ug76WZFUDN/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