./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro --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 d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 --- 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-8393723 [2022-11-18 19:47:48,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:47:48,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:47:48,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:47:48,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:47:48,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:47:48,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:47:48,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:47:48,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:47:48,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:47:48,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:47:48,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:47:48,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:47:48,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:47:48,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:47:48,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:47:48,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:47:48,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:47:48,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:47:48,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:47:48,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:47:48,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:47:48,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:47:48,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:47:48,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:47:48,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:47:48,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:47:48,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:47:48,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:47:48,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:47:48,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:47:48,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:47:48,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:47:48,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:47:48,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:47:48,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:47:48,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:47:48,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:47:48,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:47:48,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:47:48,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:47:48,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:47:48,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:47:48,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:47:48,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:47:48,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:47:48,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:47:48,231 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:47:48,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:47:48,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:47:48,233 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:47:48,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:47:48,234 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:47:48,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:47:48,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:47:48,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:47:48,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:47:48,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:47:48,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:47:48,236 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:47:48,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:47:48,237 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:47:48,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:47:48,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:47:48,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:47:48,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:47:48,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:47:48,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:47:48,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:47:48,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:47:48,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:47:48,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:47:48,240 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:47:48,241 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:47:48,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:47:48,241 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_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2022-11-18 19:47:48,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:47:48,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:47:48,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:47:48,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:47:48,601 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:47:48,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-crafted/bAnd5.i [2022-11-18 19:47:48,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/data/94b04627c/6cfa761b0c714ece8dce34080ba82eac/FLAGcb248282a [2022-11-18 19:47:49,335 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:47:49,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/sv-benchmarks/c/array-crafted/bAnd5.i [2022-11-18 19:47:49,349 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/data/94b04627c/6cfa761b0c714ece8dce34080ba82eac/FLAGcb248282a [2022-11-18 19:47:49,676 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/data/94b04627c/6cfa761b0c714ece8dce34080ba82eac [2022-11-18 19:47:49,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:47:49,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:47:49,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:47:49,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:47:49,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:47:49,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:47:49" (1/1) ... [2022-11-18 19:47:49,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed45e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:49, skipping insertion in model container [2022-11-18 19:47:49,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:47:49" (1/1) ... [2022-11-18 19:47:49,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:47:49,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:47:50,075 WARN L234 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_b4e10aea-a70c-440e-9179-cd56e826beab/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2022-11-18 19:47:50,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:47:50,097 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:47:50,148 WARN L234 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_b4e10aea-a70c-440e-9179-cd56e826beab/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2022-11-18 19:47:50,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:47:50,170 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:47:50,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50 WrapperNode [2022-11-18 19:47:50,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:47:50,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:47:50,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:47:50,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:47:50,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,236 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2022-11-18 19:47:50,237 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:47:50,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:47:50,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:47:50,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:47:50,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,278 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:47:50,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:47:50,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:47:50,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:47:50,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (1/1) ... [2022-11-18 19:47:50,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:47:50,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:50,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:47:50,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:47:50,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:47:50,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:47:50,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:47:50,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:47:50,403 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-11-18 19:47:50,403 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-11-18 19:47:50,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:47:50,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:47:50,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:47:50,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:47:50,509 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:47:50,512 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:47:50,734 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:47:50,741 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:47:50,741 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 19:47:50,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:47:50 BoogieIcfgContainer [2022-11-18 19:47:50,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:47:50,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:47:50,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:47:50,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:47:50,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:47:49" (1/3) ... [2022-11-18 19:47:50,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a956978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:47:50, skipping insertion in model container [2022-11-18 19:47:50,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:47:50" (2/3) ... [2022-11-18 19:47:50,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a956978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:47:50, skipping insertion in model container [2022-11-18 19:47:50,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:47:50" (3/3) ... [2022-11-18 19:47:50,764 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2022-11-18 19:47:50,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:47:50,789 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:47:50,871 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:47:50,879 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;@292cffb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:47:50,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:47:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:47:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 19:47:50,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:50,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:50,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:50,901 INFO L85 PathProgramCache]: Analyzing trace with hash 626669782, now seen corresponding path program 1 times [2022-11-18 19:47:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493932554] [2022-11-18 19:47:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 19:47:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-18 19:47:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 19:47:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:47:51,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:51,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493932554] [2022-11-18 19:47:51,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493932554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:47:51,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:47:51,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:47:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21175432] [2022-11-18 19:47:51,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:47:51,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:47:51,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:47:51,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:47:51,664 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 19:47:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:51,766 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2022-11-18 19:47:51,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:47:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-18 19:47:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:51,779 INFO L225 Difference]: With dead ends: 59 [2022-11-18 19:47:51,780 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 19:47:51,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:47:51,789 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:51,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:47:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 19:47:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-18 19:47:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:47:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-18 19:47:51,858 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 29 [2022-11-18 19:47:51,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:51,859 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-18 19:47:51,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 19:47:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-18 19:47:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 19:47:51,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:51,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:51,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:47:51,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1866809336, now seen corresponding path program 1 times [2022-11-18 19:47:51,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:51,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416149611] [2022-11-18 19:47:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:51,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-18 19:47:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-18 19:47:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-18 19:47:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:47:52,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416149611] [2022-11-18 19:47:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416149611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742125133] [2022-11-18 19:47:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:52,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:52,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:52,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:47:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:52,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:47:52,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:47:52,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:47:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:47:52,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742125133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:47:52,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:47:52,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-18 19:47:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079152501] [2022-11-18 19:47:52,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:47:52,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:47:52,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:47:52,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:47:52,545 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 19:47:52,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:52,754 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-11-18 19:47:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:47:52,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 31 [2022-11-18 19:47:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:52,760 INFO L225 Difference]: With dead ends: 56 [2022-11-18 19:47:52,760 INFO L226 Difference]: Without dead ends: 35 [2022-11-18 19:47:52,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-18 19:47:52,764 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:52,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 101 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:47:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-18 19:47:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-11-18 19:47:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:47:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-18 19:47:52,782 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 31 [2022-11-18 19:47:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:52,783 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-18 19:47:52,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 19:47:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-18 19:47:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 19:47:52,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:52,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:52,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:52,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:52,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1980507627, now seen corresponding path program 1 times [2022-11-18 19:47:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:52,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614378511] [2022-11-18 19:47:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:53,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:47:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:53,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 19:47:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-18 19:47:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 19:47:53,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614378511] [2022-11-18 19:47:53,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614378511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:53,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960002508] [2022-11-18 19:47:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:53,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:53,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:53,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:47:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:47:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:47:53,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:47:53,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960002508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:47:53,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:47:53,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-18 19:47:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248397624] [2022-11-18 19:47:53,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:47:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:47:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:47:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:47:53,521 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 19:47:53,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:53,567 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-11-18 19:47:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:47:53,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-11-18 19:47:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:53,569 INFO L225 Difference]: With dead ends: 48 [2022-11-18 19:47:53,569 INFO L226 Difference]: Without dead ends: 32 [2022-11-18 19:47:53,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:47:53,571 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:53,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:47:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-18 19:47:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-18 19:47:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:47:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-18 19:47:53,580 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 45 [2022-11-18 19:47:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:53,581 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-18 19:47:53,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 19:47:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-18 19:47:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 19:47:53,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:53,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:53,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:53,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:53,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:53,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:53,791 INFO L85 PathProgramCache]: Analyzing trace with hash 313275475, now seen corresponding path program 1 times [2022-11-18 19:47:53,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156139619] [2022-11-18 19:47:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:54,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:47:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:54,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 19:47:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:54,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 19:47:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:47:54,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156139619] [2022-11-18 19:47:54,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156139619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127790610] [2022-11-18 19:47:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:54,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:54,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:54,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:54,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:47:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:55,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 19:47:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:47:55,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:47:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:47:55,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127790610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:47:55,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:47:55,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-11-18 19:47:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400397565] [2022-11-18 19:47:55,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:47:55,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:47:55,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:47:55,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:47:55,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:47:55,729 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 19:47:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:47:55,907 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2022-11-18 19:47:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:47:55,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2022-11-18 19:47:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:47:55,911 INFO L225 Difference]: With dead ends: 84 [2022-11-18 19:47:55,911 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 19:47:55,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:47:55,917 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:47:55,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 286 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:47:55,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 19:47:55,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-11-18 19:47:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 19:47:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-11-18 19:47:55,934 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 47 [2022-11-18 19:47:55,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:47:55,934 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-11-18 19:47:55,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 19:47:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-11-18 19:47:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 19:47:55,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:47:55,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:47:55,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:47:56,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:56,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:47:56,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:47:56,147 INFO L85 PathProgramCache]: Analyzing trace with hash -905656161, now seen corresponding path program 1 times [2022-11-18 19:47:56,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:47:56,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059549289] [2022-11-18 19:47:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:56,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:47:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:57,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:47:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:57,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-18 19:47:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:58,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-18 19:47:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:47:58,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:47:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059549289] [2022-11-18 19:47:58,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059549289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:47:58,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191255260] [2022-11-18 19:47:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:47:58,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:47:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:47:58,539 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:47:58,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:47:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:47:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-18 19:47:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:47:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:58,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 17 [2022-11-18 19:47:59,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:59,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:47:59,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2022-11-18 19:47:59,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:47:59,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:47:59,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:47:59,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2022-11-18 19:48:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:48:00,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:02,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 87 [2022-11-18 19:48:02,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 64 [2022-11-18 19:48:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 19:48:02,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191255260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:48:02,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:48:02,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 54 [2022-11-18 19:48:02,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061045871] [2022-11-18 19:48:02,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-18 19:48:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-18 19:48:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2569, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 19:48:02,508 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 54 states, 49 states have (on average 2.204081632653061) internal successors, (108), 49 states have internal predecessors, (108), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 19:48:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:11,339 INFO L93 Difference]: Finished difference Result 294 states and 420 transitions. [2022-11-18 19:48:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-18 19:48:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 49 states have (on average 2.204081632653061) internal successors, (108), 49 states have internal predecessors, (108), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-11-18 19:48:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:11,348 INFO L225 Difference]: With dead ends: 294 [2022-11-18 19:48:11,352 INFO L226 Difference]: Without dead ends: 247 [2022-11-18 19:48:11,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3646 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1576, Invalid=11764, Unknown=0, NotChecked=0, Total=13340 [2022-11-18 19:48:11,369 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 519 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:48:11,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 507 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1240 Invalid, 0 Unknown, 309 Unchecked, 1.8s Time] [2022-11-18 19:48:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-18 19:48:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 181. [2022-11-18 19:48:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 151 states have (on average 1.2384105960264902) internal successors, (187), 161 states have internal predecessors, (187), 16 states have call successors, (16), 4 states have call predecessors, (16), 13 states have return successors, (71), 15 states have call predecessors, (71), 16 states have call successors, (71) [2022-11-18 19:48:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 274 transitions. [2022-11-18 19:48:11,490 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 274 transitions. Word has length 48 [2022-11-18 19:48:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:11,490 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 274 transitions. [2022-11-18 19:48:11,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 49 states have (on average 2.204081632653061) internal successors, (108), 49 states have internal predecessors, (108), 7 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 19:48:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 274 transitions. [2022-11-18 19:48:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 19:48:11,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:11,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:48:11,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:11,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:11,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash 780335695, now seen corresponding path program 2 times [2022-11-18 19:48:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:11,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159391098] [2022-11-18 19:48:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:12,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:48:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:13,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 19:48:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:13,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-18 19:48:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:48:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:13,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159391098] [2022-11-18 19:48:13,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159391098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873785149] [2022-11-18 19:48:13,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:48:13,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:13,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:13,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:13,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:48:13,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:48:13,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:48:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 19:48:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:13,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 19:48:13,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:13,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:13,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-11-18 19:48:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:48:14,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 19:48:14,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873785149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:48:15,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:48:15,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 36 [2022-11-18 19:48:15,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143463894] [2022-11-18 19:48:15,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:15,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 19:48:15,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 19:48:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 19:48:15,003 INFO L87 Difference]: Start difference. First operand 181 states and 274 transitions. Second operand has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 19:48:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:16,766 INFO L93 Difference]: Finished difference Result 320 states and 471 transitions. [2022-11-18 19:48:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 19:48:16,767 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2022-11-18 19:48:16,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:16,771 INFO L225 Difference]: With dead ends: 320 [2022-11-18 19:48:16,772 INFO L226 Difference]: Without dead ends: 234 [2022-11-18 19:48:16,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=319, Invalid=2437, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 19:48:16,777 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 160 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:48:16,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 369 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 544 Invalid, 0 Unknown, 144 Unchecked, 0.7s Time] [2022-11-18 19:48:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-18 19:48:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 188. [2022-11-18 19:48:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 154 states have (on average 1.2337662337662338) internal successors, (190), 164 states have internal predecessors, (190), 21 states have call successors, (21), 5 states have call predecessors, (21), 12 states have return successors, (95), 18 states have call predecessors, (95), 21 states have call successors, (95) [2022-11-18 19:48:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 306 transitions. [2022-11-18 19:48:16,852 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 306 transitions. Word has length 48 [2022-11-18 19:48:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:16,853 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 306 transitions. [2022-11-18 19:48:16,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 19:48:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 306 transitions. [2022-11-18 19:48:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 19:48:16,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:16,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:48:16,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:17,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:17,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:17,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1733279233, now seen corresponding path program 1 times [2022-11-18 19:48:17,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:17,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780999171] [2022-11-18 19:48:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:17,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:48:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 19:48:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 19:48:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:48:21,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:21,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780999171] [2022-11-18 19:48:21,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780999171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:21,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144587815] [2022-11-18 19:48:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:21,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:22,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:22,001 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:22,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:48:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:22,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-18 19:48:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:22,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:48:22,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:22,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:22,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 46 [2022-11-18 19:48:23,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 56 [2022-11-18 19:48:23,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 19:48:24,295 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-18 19:48:24,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 97 [2022-11-18 19:48:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:48:24,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:25,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-11-18 19:48:25,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2022-11-18 19:48:25,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-11-18 19:48:25,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-11-18 19:48:27,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-18 19:48:27,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:27,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-11-18 19:48:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:48:27,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144587815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:48:27,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:48:27,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 62 [2022-11-18 19:48:27,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796476794] [2022-11-18 19:48:27,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:27,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 19:48:27,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 19:48:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3457, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 19:48:27,938 INFO L87 Difference]: Start difference. First operand 188 states and 306 transitions. Second operand has 62 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 53 states have internal predecessors, (113), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 19:48:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:35,012 INFO L93 Difference]: Finished difference Result 271 states and 462 transitions. [2022-11-18 19:48:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 19:48:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 53 states have internal predecessors, (113), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 50 [2022-11-18 19:48:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:35,026 INFO L225 Difference]: With dead ends: 271 [2022-11-18 19:48:35,026 INFO L226 Difference]: Without dead ends: 265 [2022-11-18 19:48:35,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=889, Invalid=8041, Unknown=0, NotChecked=0, Total=8930 [2022-11-18 19:48:35,030 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 294 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:48:35,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 355 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1704 Invalid, 0 Unknown, 111 Unchecked, 2.1s Time] [2022-11-18 19:48:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-18 19:48:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 224. [2022-11-18 19:48:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 183 states have (on average 1.2459016393442623) internal successors, (228), 196 states have internal predecessors, (228), 26 states have call successors, (26), 5 states have call predecessors, (26), 14 states have return successors, (140), 22 states have call predecessors, (140), 26 states have call successors, (140) [2022-11-18 19:48:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 394 transitions. [2022-11-18 19:48:35,136 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 394 transitions. Word has length 50 [2022-11-18 19:48:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:35,139 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 394 transitions. [2022-11-18 19:48:35,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 53 states have internal predecessors, (113), 9 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 19:48:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 394 transitions. [2022-11-18 19:48:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 19:48:35,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:35,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:48:35,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:35,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 19:48:35,351 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1340252223, now seen corresponding path program 1 times [2022-11-18 19:48:35,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:35,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466818199] [2022-11-18 19:48:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:35,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 19:48:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:36,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-18 19:48:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 19:48:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:48:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:36,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466818199] [2022-11-18 19:48:36,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466818199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:36,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295015073] [2022-11-18 19:48:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:36,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:36,781 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:36,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:48:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:36,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 19:48:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:36,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:48:37,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:37,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:37,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 19:48:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:37,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:37,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 23 [2022-11-18 19:48:37,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:37,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:48:37,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:48:37,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2022-11-18 19:48:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:48:37,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 19:48:44,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295015073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:48:44,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:48:44,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 12] total 39 [2022-11-18 19:48:44,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636620717] [2022-11-18 19:48:44,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:44,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 19:48:44,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 19:48:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1296, Unknown=3, NotChecked=0, Total=1482 [2022-11-18 19:48:44,458 INFO L87 Difference]: Start difference. First operand 224 states and 394 transitions. Second operand has 39 states, 36 states have (on average 3.0) internal successors, (108), 37 states have internal predecessors, (108), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-18 19:48:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:48:57,314 INFO L93 Difference]: Finished difference Result 446 states and 713 transitions. [2022-11-18 19:48:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 19:48:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 3.0) internal successors, (108), 37 states have internal predecessors, (108), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) Word has length 50 [2022-11-18 19:48:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:48:57,322 INFO L225 Difference]: With dead ends: 446 [2022-11-18 19:48:57,322 INFO L226 Difference]: Without dead ends: 347 [2022-11-18 19:48:57,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=587, Invalid=4097, Unknown=8, NotChecked=0, Total=4692 [2022-11-18 19:48:57,327 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 199 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:48:57,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 848 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1290 Invalid, 0 Unknown, 392 Unchecked, 1.3s Time] [2022-11-18 19:48:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-18 19:48:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 286. [2022-11-18 19:48:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 236 states have (on average 1.25) internal successors, (295), 253 states have internal predecessors, (295), 31 states have call successors, (31), 6 states have call predecessors, (31), 18 states have return successors, (132), 26 states have call predecessors, (132), 31 states have call successors, (132) [2022-11-18 19:48:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 458 transitions. [2022-11-18 19:48:57,442 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 458 transitions. Word has length 50 [2022-11-18 19:48:57,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:48:57,442 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 458 transitions. [2022-11-18 19:48:57,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 3.0) internal successors, (108), 37 states have internal predecessors, (108), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-18 19:48:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 458 transitions. [2022-11-18 19:48:57,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 19:48:57,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:48:57,455 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:48:57,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:57,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:57,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:48:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash 372932539, now seen corresponding path program 1 times [2022-11-18 19:48:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:57,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501811782] [2022-11-18 19:48:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:57,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:48:57,690 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:48:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:48:57,744 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:48:57,747 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:48:57,748 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-18 19:48:57,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 19:48:57,755 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:48:57,759 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 19:48:57,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 07:48:57 BoogieIcfgContainer [2022-11-18 19:48:57,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 19:48:57,837 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 19:48:57,837 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 19:48:57,838 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 19:48:57,838 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:47:50" (3/4) ... [2022-11-18 19:48:57,841 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-18 19:48:57,841 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 19:48:57,842 INFO L158 Benchmark]: Toolchain (without parser) took 68159.75ms. Allocated memory was 94.4MB in the beginning and 377.5MB in the end (delta: 283.1MB). Free memory was 63.0MB in the beginning and 317.5MB in the end (delta: -254.5MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2022-11-18 19:48:57,842 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 94.4MB. Free memory was 51.3MB in the beginning and 51.3MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 19:48:57,843 INFO L158 Benchmark]: CACSL2BoogieTranslator took 483.78ms. Allocated memory is still 94.4MB. Free memory was 62.8MB in the beginning and 69.6MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 19:48:57,843 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.72ms. Allocated memory is still 94.4MB. Free memory was 69.6MB in the beginning and 67.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 19:48:57,847 INFO L158 Benchmark]: Boogie Preprocessor took 49.29ms. Allocated memory is still 94.4MB. Free memory was 67.9MB in the beginning and 66.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 19:48:57,848 INFO L158 Benchmark]: RCFGBuilder took 456.41ms. Allocated memory is still 94.4MB. Free memory was 66.4MB in the beginning and 54.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 19:48:57,849 INFO L158 Benchmark]: TraceAbstraction took 67086.23ms. Allocated memory was 94.4MB in the beginning and 377.5MB in the end (delta: 283.1MB). Free memory was 53.5MB in the beginning and 317.5MB in the end (delta: -264.1MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2022-11-18 19:48:57,849 INFO L158 Benchmark]: Witness Printer took 4.20ms. Allocated memory is still 377.5MB. Free memory is still 317.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 19:48:57,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 94.4MB. Free memory was 51.3MB in the beginning and 51.3MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 483.78ms. Allocated memory is still 94.4MB. Free memory was 62.8MB in the beginning and 69.6MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.72ms. Allocated memory is still 94.4MB. Free memory was 69.6MB in the beginning and 67.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.29ms. Allocated memory is still 94.4MB. Free memory was 67.9MB in the beginning and 66.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 456.41ms. Allocated memory is still 94.4MB. Free memory was 66.4MB in the beginning and 54.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 67086.23ms. Allocated memory was 94.4MB in the beginning and 377.5MB in the end (delta: 283.1MB). Free memory was 53.5MB in the beginning and 317.5MB in the end (delta: -264.1MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. * Witness Printer took 4.20ms. Allocated memory is still 377.5MB. Free memory is still 317.5MB. There was no memory consumed. 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 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [i=0, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=1, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=2, N=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [i=2, N=2, x={9:0}] [L45] CALL, EXPR bAnd(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-2, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [i=1, N=2, res=-2, x={9:0}, x={9:0}, x[i]=-4] [L25] res = res & x[i] VAL [i=1, N=2, res=-6, x={9:0}, x={9:0}, x[i]=-4] [L24] i++ VAL [i=2, N=2, res=-6, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, res=-6, x={9:0}, x={9:0}] [L27] return res; VAL [\result=-6, i=2, N=2, res=-6, x={9:0}, x={9:0}] [L45] RET, EXPR bAnd(x) VAL [bAnd(x)=-6, i=2, N=2, x={9:0}] [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [i=2, N=2, ret=-6, temp=-2, x={9:0}] [L48] CALL, EXPR bAnd(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-4, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [i=1, N=2, res=-4, x={9:0}, x={9:0}, x[i]=-2] [L25] res = res & x[i] VAL [i=1, N=2, res=-4294967296, x={9:0}, x={9:0}, x[i]=-2] [L24] i++ VAL [i=2, N=2, res=-4294967296, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, res=-4294967296, x={9:0}, x={9:0}] [L27] return res; VAL [\result=0, i=2, N=2, res=-4294967296, x={9:0}, x={9:0}] [L48] RET, EXPR bAnd(x) VAL [bAnd(x)=0, i=2, N=2, ret=-6, temp=-2, x={9:0}] [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [i=2, i=0, N=2, ret=-6, ret2=0, temp=-4, x={9:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro 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 -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2022-11-18 19:49:01,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:49:01,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:49:01,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:49:01,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:49:01,321 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:49:01,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-crafted/bAnd5.i [2022-11-18 19:49:01,408 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/data/a720589ee/ad7ef2c5bb034675a7f198073467c37c/FLAG33dc7d350 [2022-11-18 19:49:02,051 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:49:02,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/sv-benchmarks/c/array-crafted/bAnd5.i [2022-11-18 19:49:02,065 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/data/a720589ee/ad7ef2c5bb034675a7f198073467c37c/FLAG33dc7d350 [2022-11-18 19:49:02,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/data/a720589ee/ad7ef2c5bb034675a7f198073467c37c [2022-11-18 19:49:02,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:49:02,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:49:02,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:49:02,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:49:02,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:49:02,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd06aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02, skipping insertion in model container [2022-11-18 19:49:02,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:49:02,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:49:02,690 WARN L234 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_b4e10aea-a70c-440e-9179-cd56e826beab/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2022-11-18 19:49:02,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:49:02,706 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:49:02,772 WARN L234 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_b4e10aea-a70c-440e-9179-cd56e826beab/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2022-11-18 19:49:02,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:49:02,800 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:49:02,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02 WrapperNode [2022-11-18 19:49:02,801 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:49:02,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:49:02,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:49:02,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:49:02,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,876 INFO L138 Inliner]: procedures = 18, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2022-11-18 19:49:02,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:49:02,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:49:02,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:49:02,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:49:02,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:49:02,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:49:02,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:49:02,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:49:02,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (1/1) ... [2022-11-18 19:49:02,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:49:02,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:49:02,979 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:49:02,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:49:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:49:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 19:49:03,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:49:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 19:49:03,042 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-11-18 19:49:03,042 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-11-18 19:49:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:49:03,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:49:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:49:03,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 19:49:03,180 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:49:03,186 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:49:03,493 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:49:03,500 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:49:03,501 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 19:49:03,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:49:03 BoogieIcfgContainer [2022-11-18 19:49:03,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:49:03,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:49:03,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:49:03,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:49:03,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:49:02" (1/3) ... [2022-11-18 19:49:03,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8f5000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:49:03, skipping insertion in model container [2022-11-18 19:49:03,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:49:02" (2/3) ... [2022-11-18 19:49:03,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8f5000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:49:03, skipping insertion in model container [2022-11-18 19:49:03,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:49:03" (3/3) ... [2022-11-18 19:49:03,533 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2022-11-18 19:49:03,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:49:03,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:49:03,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:49:03,660 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;@5c562daa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:49:03,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:49:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:49:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 19:49:03,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:03,692 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:03,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash 310067850, now seen corresponding path program 1 times [2022-11-18 19:49:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:03,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602083131] [2022-11-18 19:49:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:03,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:03,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:03,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:03,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 19:49:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 19:49:03,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 19:49:04,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:04,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602083131] [2022-11-18 19:49:04,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602083131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:04,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:04,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:49:04,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073684453] [2022-11-18 19:49:04,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:04,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:49:04,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:49:04,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:49:04,094 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 19:49:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:04,140 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-11-18 19:49:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:49:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-11-18 19:49:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:04,151 INFO L225 Difference]: With dead ends: 51 [2022-11-18 19:49:04,152 INFO L226 Difference]: Without dead ends: 23 [2022-11-18 19:49:04,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:49:04,163 INFO L413 NwaCegarLoop]: 33 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, 33 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 [2022-11-18 19:49:04,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:49:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-18 19:49:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-18 19:49:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:49:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-18 19:49:04,225 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2022-11-18 19:49:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:04,226 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-18 19:49:04,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 19:49:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-18 19:49:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 19:49:04,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:04,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:04,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:04,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:04,449 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:04,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1979244726, now seen corresponding path program 1 times [2022-11-18 19:49:04,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:04,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380967075] [2022-11-18 19:49:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:04,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:04,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:04,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:04,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 19:49:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:04,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:49:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:49:04,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:04,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:04,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380967075] [2022-11-18 19:49:04,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380967075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:04,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:04,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:49:04,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703338131] [2022-11-18 19:49:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:04,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:49:04,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:04,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:49:04,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:04,726 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 19:49:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:04,797 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-18 19:49:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:49:04,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-18 19:49:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:04,800 INFO L225 Difference]: With dead ends: 43 [2022-11-18 19:49:04,820 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 19:49:04,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:49:04,824 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:04,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:49:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 19:49:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-18 19:49:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:49:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-18 19:49:04,848 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2022-11-18 19:49:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:04,848 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-18 19:49:04,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 19:49:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-18 19:49:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 19:49:04,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:04,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:04,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:05,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:05,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash -789530644, now seen corresponding path program 1 times [2022-11-18 19:49:05,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:05,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573645915] [2022-11-18 19:49:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:05,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:05,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:05,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 19:49:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:49:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:49:05,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 19:49:05,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:05,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573645915] [2022-11-18 19:49:05,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573645915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:05,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:05,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-18 19:49:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430754180] [2022-11-18 19:49:05,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:05,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:49:05,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:49:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:49:05,387 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 19:49:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:05,513 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-18 19:49:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:49:05,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2022-11-18 19:49:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:05,516 INFO L225 Difference]: With dead ends: 45 [2022-11-18 19:49:05,516 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 19:49:05,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:49:05,518 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:05,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:49:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 19:49:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-18 19:49:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:49:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-18 19:49:05,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2022-11-18 19:49:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:05,527 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-18 19:49:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 19:49:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-18 19:49:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 19:49:05,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:05,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:05,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:05,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:05,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 64401422, now seen corresponding path program 2 times [2022-11-18 19:49:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:05,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713840424] [2022-11-18 19:49:05,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:49:05,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:05,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:05,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 19:49:05,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:49:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:49:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:49:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:49:05,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:49:05,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713840424] [2022-11-18 19:49:05,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713840424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:49:05,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:49:05,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:49:05,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770640716] [2022-11-18 19:49:05,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:49:05,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:49:05,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:49:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:49:05,922 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 19:49:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:06,005 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-18 19:49:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:49:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-18 19:49:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:06,007 INFO L225 Difference]: With dead ends: 45 [2022-11-18 19:49:06,007 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 19:49:06,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:49:06,009 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:06,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 19:49:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 19:49:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-18 19:49:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:49:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-18 19:49:06,018 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2022-11-18 19:49:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:06,018 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-18 19:49:06,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 19:49:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-18 19:49:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 19:49:06,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:06,020 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:06,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:06,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:06,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:06,251 INFO L85 PathProgramCache]: Analyzing trace with hash 343299212, now seen corresponding path program 1 times [2022-11-18 19:49:06,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:06,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269762341] [2022-11-18 19:49:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:06,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:06,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:06,253 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:06,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 19:49:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:06,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:49:06,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 19:49:06,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 19:49:07,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:07,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269762341] [2022-11-18 19:49:07,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269762341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:07,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:07,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-18 19:49:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2340833] [2022-11-18 19:49:07,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:07,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:49:07,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:07,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:49:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:49:07,041 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 19:49:07,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:07,453 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-11-18 19:49:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 19:49:07,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-11-18 19:49:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:07,456 INFO L225 Difference]: With dead ends: 65 [2022-11-18 19:49:07,456 INFO L226 Difference]: Without dead ends: 52 [2022-11-18 19:49:07,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:49:07,458 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:07,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 62 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:49:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-18 19:49:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2022-11-18 19:49:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:49:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-18 19:49:07,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2022-11-18 19:49:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:07,471 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-18 19:49:07,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 19:49:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-18 19:49:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 19:49:07,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:07,473 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:07,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:07,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:07,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1487527882, now seen corresponding path program 1 times [2022-11-18 19:49:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:07,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731162579] [2022-11-18 19:49:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:49:07,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:07,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:07,690 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:07,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 19:49:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:49:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 19:49:07,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:08,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:08,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:08,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2022-11-18 19:49:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:09,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:09,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2022-11-18 19:49:09,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:09,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:49:09,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:09,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 48 [2022-11-18 19:49:09,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:09,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 25 [2022-11-18 19:49:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:49:10,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:13,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-11-18 19:49:13,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:13,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2022-11-18 19:49:15,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-11-18 19:49:15,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:15,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 1 [2022-11-18 19:49:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:49:16,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:16,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731162579] [2022-11-18 19:49:16,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731162579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:16,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:16,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2022-11-18 19:49:16,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338818333] [2022-11-18 19:49:16,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:16,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 19:49:16,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 19:49:16,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 19:49:16,055 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 19:49:19,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:49:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:25,246 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2022-11-18 19:49:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 19:49:25,248 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-11-18 19:49:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:25,252 INFO L225 Difference]: With dead ends: 87 [2022-11-18 19:49:25,252 INFO L226 Difference]: Without dead ends: 83 [2022-11-18 19:49:25,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:49:25,255 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 112 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 97 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:25,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 212 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 698 Invalid, 1 Unknown, 49 Unchecked, 5.9s Time] [2022-11-18 19:49:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-18 19:49:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2022-11-18 19:49:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-18 19:49:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2022-11-18 19:49:25,284 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 41 [2022-11-18 19:49:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:25,285 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2022-11-18 19:49:25,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 19:49:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2022-11-18 19:49:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 19:49:25,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:25,287 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:25,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:25,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:25,503 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:25,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:25,504 INFO L85 PathProgramCache]: Analyzing trace with hash 380877448, now seen corresponding path program 2 times [2022-11-18 19:49:25,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:25,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196886501] [2022-11-18 19:49:25,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:49:25,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:25,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:25,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:25,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 19:49:25,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:49:25,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:49:25,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:49:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:49:25,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:49:26,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:26,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196886501] [2022-11-18 19:49:26,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196886501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:26,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:26,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2022-11-18 19:49:26,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408573973] [2022-11-18 19:49:26,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:26,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:49:26,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:26,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:49:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:49:26,630 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 19:49:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:27,541 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2022-11-18 19:49:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 19:49:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-18 19:49:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:27,543 INFO L225 Difference]: With dead ends: 104 [2022-11-18 19:49:27,543 INFO L226 Difference]: Without dead ends: 78 [2022-11-18 19:49:27,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:49:27,545 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 78 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:27,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 172 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:49:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-18 19:49:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2022-11-18 19:49:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 19:49:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-11-18 19:49:27,564 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2022-11-18 19:49:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:27,565 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-11-18 19:49:27,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 19:49:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-11-18 19:49:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 19:49:27,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:27,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:27,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:27,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:27,775 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:27,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1155110252, now seen corresponding path program 3 times [2022-11-18 19:49:27,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:27,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369999127] [2022-11-18 19:49:27,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:49:27,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:27,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:27,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:27,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 19:49:27,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 19:49:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:49:27,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:49:27,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:49:28,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:49:28,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:28,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369999127] [2022-11-18 19:49:28,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369999127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:28,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:28,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-11-18 19:49:28,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171125672] [2022-11-18 19:49:28,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:28,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 19:49:28,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 19:49:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:49:28,515 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 19:49:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:29,032 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-11-18 19:49:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:49:29,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-11-18 19:49:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:29,034 INFO L225 Difference]: With dead ends: 77 [2022-11-18 19:49:29,034 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 19:49:29,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:49:29,036 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 116 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:29,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 125 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:49:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 19:49:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-11-18 19:49:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 19:49:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-18 19:49:29,058 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2022-11-18 19:49:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:29,060 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-18 19:49:29,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 19:49:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-18 19:49:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 19:49:29,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:29,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:29,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:29,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:29,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -83406906, now seen corresponding path program 4 times [2022-11-18 19:49:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:29,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727161701] [2022-11-18 19:49:29,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:49:29,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:29,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:29,274 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:29,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 19:49:29,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:49:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:49:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:49:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 19:49:29,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 19:49:30,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:30,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727161701] [2022-11-18 19:49:30,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727161701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:30,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:30,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-11-18 19:49:30,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460720688] [2022-11-18 19:49:30,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:30,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 19:49:30,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 19:49:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-18 19:49:30,110 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 19:49:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:30,564 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-18 19:49:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:49:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2022-11-18 19:49:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:30,570 INFO L225 Difference]: With dead ends: 64 [2022-11-18 19:49:30,570 INFO L226 Difference]: Without dead ends: 33 [2022-11-18 19:49:30,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:49:30,571 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:30,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 102 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:49:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-18 19:49:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-18 19:49:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:49:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-18 19:49:30,581 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 45 [2022-11-18 19:49:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:30,593 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-18 19:49:30,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 19:49:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-18 19:49:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 19:49:30,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:30,599 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:30,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:30,814 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1254464106, now seen corresponding path program 5 times [2022-11-18 19:49:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:30,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279503879] [2022-11-18 19:49:30,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:49:30,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:30,817 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:30,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 19:49:30,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 19:49:30,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:49:30,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 19:49:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 19:49:31,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:49:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 19:49:32,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:49:32,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279503879] [2022-11-18 19:49:32,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279503879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:49:32,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:49:32,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-11-18 19:49:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959745582] [2022-11-18 19:49:32,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:49:32,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 19:49:32,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:49:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 19:49:32,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-18 19:49:32,191 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 19:49:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:49:33,363 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-11-18 19:49:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 19:49:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2022-11-18 19:49:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:49:33,364 INFO L225 Difference]: With dead ends: 89 [2022-11-18 19:49:33,365 INFO L226 Difference]: Without dead ends: 70 [2022-11-18 19:49:33,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2022-11-18 19:49:33,366 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:49:33,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 145 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 245 Invalid, 0 Unknown, 39 Unchecked, 0.6s Time] [2022-11-18 19:49:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-18 19:49:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-11-18 19:49:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-18 19:49:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-11-18 19:49:33,383 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 49 [2022-11-18 19:49:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:49:33,384 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-11-18 19:49:33,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 19:49:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-11-18 19:49:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 19:49:33,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:49:33,386 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:49:33,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:49:33,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:33,601 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:49:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:49:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 715974184, now seen corresponding path program 6 times [2022-11-18 19:49:33,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:49:33,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455915924] [2022-11-18 19:49:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:49:33,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:49:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:49:33,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:49:33,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 19:49:33,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 19:49:33,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:49:33,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 19:49:33,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:49:33,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 19:49:34,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:34,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:34,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:34,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2022-11-18 19:49:35,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:49:35,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:35,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:35,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:49:35,562 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 19:49:35,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2022-11-18 19:49:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:35,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:36,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2022-11-18 19:49:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:36,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:49:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:49:36,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:36,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-18 19:49:36,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:49:36,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 34 [2022-11-18 19:49:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 19:49:37,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:50:12,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:50:12,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 378 treesize of output 230 [2022-11-18 19:50:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 19:50:14,582 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:50:14,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455915924] [2022-11-18 19:50:14,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455915924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:50:14,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:50:14,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 35] total 59 [2022-11-18 19:50:14,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717089194] [2022-11-18 19:50:14,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:50:14,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-18 19:50:14,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:50:14,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-18 19:50:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3078, Unknown=9, NotChecked=0, Total=3422 [2022-11-18 19:50:14,586 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 59 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 19:50:44,065 WARN L233 SmtUtils]: Spent 23.59s on a formula simplification. DAG size of input: 221 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:51:01,860 WARN L233 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 233 DAG size of output: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:51:11,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:51:17,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:51:19,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:51:21,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:51:43,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:51:45,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:51:47,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:51:49,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:52:10,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:52:35,724 WARN L233 SmtUtils]: Spent 15.43s on a formula simplification. DAG size of input: 228 DAG size of output: 184 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:52:37,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:53:14,760 WARN L233 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 225 DAG size of output: 181 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:53:38,992 WARN L233 SmtUtils]: Spent 10.09s on a formula simplification. DAG size of input: 90 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 19:53:42,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:53:44,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:53:46,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:54:43,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:55:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:55:17,158 INFO L93 Difference]: Finished difference Result 245 states and 303 transitions. [2022-11-18 19:55:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-18 19:55:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2022-11-18 19:55:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:55:17,161 INFO L225 Difference]: With dead ends: 245 [2022-11-18 19:55:17,161 INFO L226 Difference]: Without dead ends: 183 [2022-11-18 19:55:17,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4387 ImplicationChecksByTransitivity, 261.6s TimeCoverageRelationStatistics Valid=1687, Invalid=13550, Unknown=15, NotChecked=0, Total=15252 [2022-11-18 19:55:17,169 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 276 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 226 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 77.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:55:17,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 187 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 2094 Invalid, 11 Unknown, 83 Unchecked, 77.6s Time] [2022-11-18 19:55:17,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-18 19:55:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 102. [2022-11-18 19:55:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 89 states have internal predecessors, (100), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (14), 9 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 19:55:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2022-11-18 19:55:17,210 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 51 [2022-11-18 19:55:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:55:17,211 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2022-11-18 19:55:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 19:55:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2022-11-18 19:55:17,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 19:55:17,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:55:17,212 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:17,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:17,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:55:17,425 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:55:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:17,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1840215844, now seen corresponding path program 7 times [2022-11-18 19:55:17,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:55:17,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760331043] [2022-11-18 19:55:17,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:55:17,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:55:17,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:55:17,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:55:17,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-18 19:55:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:55:17,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:55:17,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 19:55:17,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 19:55:18,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:55:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760331043] [2022-11-18 19:55:18,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760331043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:18,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:55:18,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-11-18 19:55:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784202413] [2022-11-18 19:55:18,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:18,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:55:18,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:55:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:55:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:55:18,759 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 19:55:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:55:19,923 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-11-18 19:55:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 19:55:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2022-11-18 19:55:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:55:19,927 INFO L225 Difference]: With dead ends: 115 [2022-11-18 19:55:19,927 INFO L226 Difference]: Without dead ends: 78 [2022-11-18 19:55:19,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-11-18 19:55:19,928 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:55:19,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 117 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 19:55:19,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-18 19:55:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-18 19:55:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 states have internal predecessors, (78), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-18 19:55:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2022-11-18 19:55:19,961 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 55 [2022-11-18 19:55:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:55:19,961 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2022-11-18 19:55:19,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 19:55:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2022-11-18 19:55:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 19:55:19,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:55:19,963 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:19,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-18 19:55:20,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:55:20,175 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:55:20,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:20,176 INFO L85 PathProgramCache]: Analyzing trace with hash -740392824, now seen corresponding path program 8 times [2022-11-18 19:55:20,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:55:20,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560787500] [2022-11-18 19:55:20,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:55:20,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:55:20,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:55:20,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:55:20,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 19:55:20,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:55:20,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:55:20,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 19:55:20,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 19:55:20,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 19:55:21,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:55:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560787500] [2022-11-18 19:55:21,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560787500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:21,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:55:21,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-18 19:55:21,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797975586] [2022-11-18 19:55:21,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:21,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 19:55:21,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:55:21,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 19:55:21,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-11-18 19:55:21,747 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 19:55:22,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:55:22,688 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2022-11-18 19:55:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 19:55:22,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-11-18 19:55:22,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:55:22,689 INFO L225 Difference]: With dead ends: 109 [2022-11-18 19:55:22,689 INFO L226 Difference]: Without dead ends: 74 [2022-11-18 19:55:22,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-11-18 19:55:22,692 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 187 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:55:22,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 178 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 19:55:22,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-18 19:55:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 38. [2022-11-18 19:55:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 19:55:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-18 19:55:22,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 55 [2022-11-18 19:55:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:55:22,711 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-18 19:55:22,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 19:55:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-18 19:55:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 19:55:22,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:55:22,712 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:22,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:22,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:55:22,912 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:55:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:22,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2073903416, now seen corresponding path program 9 times [2022-11-18 19:55:22,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:55:22,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725135324] [2022-11-18 19:55:22,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:55:22,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:55:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:55:22,915 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:55:22,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 19:55:23,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 19:55:23,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:55:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:55:23,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 63 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-18 19:55:23,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:55:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-18 19:55:24,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:55:24,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725135324] [2022-11-18 19:55:24,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725135324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:55:24,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:55:24,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2022-11-18 19:55:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450789226] [2022-11-18 19:55:24,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:55:24,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 19:55:24,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:55:24,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 19:55:24,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-11-18 19:55:24,328 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 19:55:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:55:27,596 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-11-18 19:55:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 19:55:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2022-11-18 19:55:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:55:27,599 INFO L225 Difference]: With dead ends: 125 [2022-11-18 19:55:27,599 INFO L226 Difference]: Without dead ends: 100 [2022-11-18 19:55:27,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 19:55:27,601 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:55:27,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 145 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 19:55:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-18 19:55:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-11-18 19:55:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 83 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-18 19:55:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2022-11-18 19:55:27,636 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 59 [2022-11-18 19:55:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:55:27,637 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2022-11-18 19:55:27,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 19:55:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2022-11-18 19:55:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-18 19:55:27,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:55:27,638 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:55:27,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-18 19:55:27,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:55:27,843 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:55:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:55:27,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2140154630, now seen corresponding path program 10 times [2022-11-18 19:55:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:55:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148217519] [2022-11-18 19:55:27,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:55:27,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:55:27,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:55:27,845 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 19:55:27,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e10aea-a70c-440e-9179-cd56e826beab/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 19:55:28,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:55:28,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:55:28,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-18 19:55:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:55:28,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 19:55:29,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:29,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:29,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:29,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 49 [2022-11-18 19:55:30,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:55:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:30,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:30,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:30,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:30,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:55:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:30,612 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 19:55:30,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 89 [2022-11-18 19:55:31,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:55:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:55:31,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,042 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-18 19:55:31,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 89 [2022-11-18 19:55:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:31,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 66 [2022-11-18 19:55:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 19:55:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:55:31,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:31,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 78 [2022-11-18 19:55:33,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:55:33,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 43 [2022-11-18 19:55:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 19:55:33,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:56:59,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 537 treesize of output 473 [2022-11-18 19:56:59,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:56:59,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40558 treesize of output 27806