./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:59:18,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:59:18,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:59:18,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:59:18,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:59:18,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:59:18,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:59:18,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:59:18,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:59:18,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:59:18,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:59:18,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:59:18,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:59:18,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:59:18,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:59:18,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:59:18,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:59:18,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:59:18,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:59:18,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:59:18,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:59:18,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:59:18,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:59:18,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:59:18,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:59:18,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:59:18,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:59:18,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:59:18,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:59:18,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:59:18,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:59:18,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:59:18,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:59:18,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:59:18,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:59:18,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:59:18,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:59:18,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:59:18,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:59:18,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:59:18,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:59:18,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:59:18,257 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:59:18,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:59:18,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:59:18,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:59:18,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:59:18,260 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:59:18,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:59:18,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:59:18,261 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:59:18,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:59:18,263 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:59:18,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:59:18,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:59:18,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:59:18,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:59:18,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:59:18,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:59:18,264 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:59:18,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:59:18,264 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:59:18,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:59:18,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:59:18,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:59:18,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:59:18,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:59:18,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:59:18,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:59:18,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:59:18,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:59:18,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:59:18,266 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:59:18,266 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:59:18,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:59:18,267 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_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2022-11-20 10:59:18,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:59:18,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:59:18,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:59:18,604 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:59:18,604 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:59:18,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2022-11-20 10:59:21,731 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:59:21,971 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:59:21,972 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2022-11-20 10:59:22,000 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/data/01dc5a3c4/75ccf96378a44fbab42f3aa5bf1f4183/FLAGfb8f92a13 [2022-11-20 10:59:22,015 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/data/01dc5a3c4/75ccf96378a44fbab42f3aa5bf1f4183 [2022-11-20 10:59:22,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:59:22,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:59:22,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:59:22,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:59:22,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:59:22,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e7c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22, skipping insertion in model container [2022-11-20 10:59:22,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:59:22,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:59:22,458 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2022-11-20 10:59:22,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:59:22,480 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:59:22,542 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2022-11-20 10:59:22,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:59:22,571 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:59:22,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22 WrapperNode [2022-11-20 10:59:22,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:59:22,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:59:22,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:59:22,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:59:22,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,620 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 118 [2022-11-20 10:59:22,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:59:22,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:59:22,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:59:22,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:59:22,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,661 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:59:22,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:59:22,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:59:22,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:59:22,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (1/1) ... [2022-11-20 10:59:22,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:59:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:22,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:59:22,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:59:22,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:59:22,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:59:22,764 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-20 10:59:22,765 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-20 10:59:22,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:59:22,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:59:22,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:59:22,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 10:59:22,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 10:59:22,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:59:22,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 10:59:22,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:59:22,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:59:22,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:59:22,922 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:59:22,924 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:59:23,146 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:59:23,158 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:59:23,159 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 10:59:23,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:59:23 BoogieIcfgContainer [2022-11-20 10:59:23,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:59:23,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:59:23,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:59:23,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:59:23,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:59:22" (1/3) ... [2022-11-20 10:59:23,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddc1836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:59:23, skipping insertion in model container [2022-11-20 10:59:23,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:59:22" (2/3) ... [2022-11-20 10:59:23,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddc1836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:59:23, skipping insertion in model container [2022-11-20 10:59:23,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:59:23" (3/3) ... [2022-11-20 10:59:23,170 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2022-11-20 10:59:23,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:59:23,200 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:59:23,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:59:23,256 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;@63967099, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:59:23,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:59:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 26 states have (on average 1.5) internal successors, (39), 27 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:59:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:59:23,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:23,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:23,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2128592868, now seen corresponding path program 1 times [2022-11-20 10:59:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:23,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973527903] [2022-11-20 10:59:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:23,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:23,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 10:59:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:23,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973527903] [2022-11-20 10:59:23,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973527903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:23,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:23,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:59:23,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813383757] [2022-11-20 10:59:23,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:23,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:59:23,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:23,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:59:23,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:59:23,704 INFO L87 Difference]: Start difference. First operand has 31 states, 26 states have (on average 1.5) internal successors, (39), 27 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 10:59:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:23,770 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-11-20 10:59:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:59:23,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-20 10:59:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:23,780 INFO L225 Difference]: With dead ends: 56 [2022-11-20 10:59:23,781 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 10:59:23,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:59:23,787 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:23,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:59:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 10:59:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 10:59:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:59:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-20 10:59:23,828 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 17 [2022-11-20 10:59:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:23,829 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-20 10:59:23,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 10:59:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-20 10:59:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 10:59:23,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:23,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:23,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:59:23,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1341887012, now seen corresponding path program 1 times [2022-11-20 10:59:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:23,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809730658] [2022-11-20 10:59:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:23,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:24,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 10:59:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:24,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:24,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809730658] [2022-11-20 10:59:24,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809730658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:24,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:24,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:59:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592154953] [2022-11-20 10:59:24,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:24,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:59:24,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:24,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:59:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:59:24,103 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 10:59:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:24,156 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-11-20 10:59:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:59:24,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-20 10:59:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:24,158 INFO L225 Difference]: With dead ends: 48 [2022-11-20 10:59:24,159 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 10:59:24,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:59:24,160 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:24,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:59:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 10:59:24,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-11-20 10:59:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:59:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-20 10:59:24,172 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-11-20 10:59:24,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:24,172 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-20 10:59:24,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 10:59:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-20 10:59:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:59:24,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:24,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:24,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:59:24,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:24,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2097266908, now seen corresponding path program 1 times [2022-11-20 10:59:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:24,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631531024] [2022-11-20 10:59:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:24,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:59:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:24,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 10:59:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:59:24,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:24,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631531024] [2022-11-20 10:59:24,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631531024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:24,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587336003] [2022-11-20 10:59:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:24,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:24,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:24,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:24,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:59:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:59:24,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:24,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:59:24,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587336003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:24,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:24,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-11-20 10:59:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579737422] [2022-11-20 10:59:24,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:24,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:59:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:59:24,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:59:24,769 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 10:59:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:24,827 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-11-20 10:59:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:59:24,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-11-20 10:59:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:24,828 INFO L225 Difference]: With dead ends: 49 [2022-11-20 10:59:24,828 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 10:59:24,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:59:24,830 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:24,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 88 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:59:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 10:59:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 10:59:24,839 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) [2022-11-20 10:59:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-20 10:59:24,840 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 26 [2022-11-20 10:59:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:24,843 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-20 10:59:24,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 10:59:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-20 10:59:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 10:59:24,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:24,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:24,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:25,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-20 10:59:25,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:25,054 INFO L85 PathProgramCache]: Analyzing trace with hash -867054116, now seen corresponding path program 2 times [2022-11-20 10:59:25,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:25,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111498677] [2022-11-20 10:59:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:25,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:25,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:59:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 10:59:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:25,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:59:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 10:59:25,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:25,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111498677] [2022-11-20 10:59:25,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111498677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:59:25,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:59:25,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 10:59:25,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703733888] [2022-11-20 10:59:25,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:59:25,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:59:25,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:59:25,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:59:25,623 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:59:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:25,810 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-11-20 10:59:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:59:25,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-20 10:59:25,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:25,815 INFO L225 Difference]: With dead ends: 43 [2022-11-20 10:59:25,815 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 10:59:25,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:59:25,821 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:25,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 133 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:59:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 10:59:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-20 10:59:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2022-11-20 10:59:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-20 10:59:25,829 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 35 [2022-11-20 10:59:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:25,829 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-20 10:59:25,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:59:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-20 10:59:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 10:59:25,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:25,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:25,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:59:25,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash -867052442, now seen corresponding path program 1 times [2022-11-20 10:59:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:25,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296607775] [2022-11-20 10:59:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:26,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:59:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:26,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 10:59:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:26,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:59:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:59:26,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296607775] [2022-11-20 10:59:26,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296607775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:26,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268913614] [2022-11-20 10:59:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:26,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:26,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:26,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:59:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:26,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 10:59:26,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:27,057 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 17 treesize of output 9 [2022-11-20 10:59:27,125 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_405 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_405))) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|))) is different from true [2022-11-20 10:59:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:27,164 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 24 treesize of output 24 [2022-11-20 10:59:27,214 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 25 treesize of output 13 [2022-11-20 10:59:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-20 10:59:27,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:27,377 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_408 (Array Int Int)) (|v_node_create_~temp~0#1.base_13| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_13| v_ArrVal_408) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (or (<= (+ .cse0 1) 0) (<= 1 .cse0) (not (< |v_node_create_~temp~0#1.base_13| |c_#StackHeapBarrier|))))) is different from false [2022-11-20 10:59:27,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268913614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:27,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:27,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-11-20 10:59:27,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961211278] [2022-11-20 10:59:27,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:27,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:59:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:59:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=439, Unknown=2, NotChecked=86, Total=600 [2022-11-20 10:59:27,383 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 10:59:27,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:27,775 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-11-20 10:59:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:59:27,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-11-20 10:59:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:27,777 INFO L225 Difference]: With dead ends: 37 [2022-11-20 10:59:27,777 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 10:59:27,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=698, Unknown=2, NotChecked=110, Total=930 [2022-11-20 10:59:27,779 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:27,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 183 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:59:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 10:59:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 10:59:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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) [2022-11-20 10:59:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-20 10:59:27,786 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 35 [2022-11-20 10:59:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:27,787 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-20 10:59:27,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 10:59:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-20 10:59:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 10:59:27,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:27,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:27,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:27,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:27,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1386356248, now seen corresponding path program 1 times [2022-11-20 10:59:27,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:27,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986177093] [2022-11-20 10:59:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:28,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:59:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:28,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 10:59:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:59:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:59:29,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:29,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986177093] [2022-11-20 10:59:29,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986177093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:29,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987108693] [2022-11-20 10:59:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:29,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:29,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:29,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:29,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:59:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 10:59:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:29,445 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 8 treesize of output 4 [2022-11-20 10:59:29,518 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_557 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_557) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-20 10:59:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:29,541 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 15 treesize of output 17 [2022-11-20 10:59:29,651 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2022-11-20 10:59:29,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2022-11-20 10:59:29,662 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 16 treesize of output 8 [2022-11-20 10:59:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-20 10:59:29,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:31,941 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_append_~last~0#1.base| Int) (|v_node_create_~temp~0#1.base_16| Int) (|ULTIMATE.start_sll_append_~last~0#1.offset| Int) (v_ArrVal_562 (Array Int Int)) (v_ArrVal_558 Int)) (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_16| v_ArrVal_562))) (let ((.cse0 (select .cse2 |ULTIMATE.start_sll_append_~last~0#1.base|)) (.cse1 (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (or (not (< |v_node_create_~temp~0#1.base_16| |c_#StackHeapBarrier|)) (not (= (select .cse0 .cse1) 0)) (not (= (select (select (store .cse2 |ULTIMATE.start_sll_append_~last~0#1.base| (store .cse0 .cse1 v_ArrVal_558)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0)))))) is different from false [2022-11-20 10:59:31,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987108693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:31,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:31,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-11-20 10:59:31,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107826902] [2022-11-20 10:59:31,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:31,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 10:59:31,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 10:59:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=782, Unknown=3, NotChecked=114, Total=992 [2022-11-20 10:59:31,946 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 10:59:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:33,620 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-20 10:59:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:59:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-11-20 10:59:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:33,622 INFO L225 Difference]: With dead ends: 50 [2022-11-20 10:59:33,622 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 10:59:33,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=222, Invalid=1763, Unknown=3, NotChecked=174, Total=2162 [2022-11-20 10:59:33,624 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:33,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 209 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 283 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-20 10:59:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 10:59:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2022-11-20 10:59:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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) [2022-11-20 10:59:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-20 10:59:33,634 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 38 [2022-11-20 10:59:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:33,634 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-20 10:59:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 10:59:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-20 10:59:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 10:59:33,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:33,636 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:33,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:33,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:33,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1386357922, now seen corresponding path program 1 times [2022-11-20 10:59:33,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:33,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822947952] [2022-11-20 10:59:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:33,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:34,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:59:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:34,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 10:59:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:35,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:59:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:59:35,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:35,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822947952] [2022-11-20 10:59:35,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822947952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:35,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314737628] [2022-11-20 10:59:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:35,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:35,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:35,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:35,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:59:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:35,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 10:59:35,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:35,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 10:59:36,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-20 10:59:36,221 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:59:36,222 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-11-20 10:59:36,226 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 7 treesize of output 3 [2022-11-20 10:59:36,347 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_714 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_714))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_715 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_715) |c_#memory_$Pointer$.base|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-20 10:59:36,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:36,395 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 10:59:36,395 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2022-11-20 10:59:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:36,405 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 14 treesize of output 16 [2022-11-20 10:59:36,416 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 10:59:36,417 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 15 treesize of output 15 [2022-11-20 10:59:36,480 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 15 treesize of output 7 [2022-11-20 10:59:36,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:59:36,566 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2022-11-20 10:59:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-20 10:59:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:36,778 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_721 (Array Int Int)) (|v_node_create_~temp~0#1.base_19| Int) (v_ArrVal_720 (Array Int Int))) (or (not (< |v_node_create_~temp~0#1.base_19| |c_#StackHeapBarrier|)) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_19| v_ArrVal_720))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_19| v_ArrVal_721) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4)) 0)) (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_19|) 0)))) is different from false [2022-11-20 10:59:36,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314737628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:36,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:36,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2022-11-20 10:59:36,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646381025] [2022-11-20 10:59:36,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:36,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 10:59:36,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:36,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 10:59:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1105, Unknown=2, NotChecked=134, Total=1332 [2022-11-20 10:59:36,784 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 34 states, 32 states have (on average 1.90625) internal successors, (61), 29 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 10:59:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:40,343 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-11-20 10:59:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:59:40,344 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.90625) internal successors, (61), 29 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-11-20 10:59:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:40,346 INFO L225 Difference]: With dead ends: 42 [2022-11-20 10:59:40,346 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 10:59:40,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=205, Invalid=1963, Unknown=2, NotChecked=182, Total=2352 [2022-11-20 10:59:40,348 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:40,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 355 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 466 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 10:59:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 10:59:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-20 10:59:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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) [2022-11-20 10:59:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-20 10:59:40,361 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 38 [2022-11-20 10:59:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:40,361 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-20 10:59:40,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.90625) internal successors, (61), 29 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 10:59:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-20 10:59:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 10:59:40,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:40,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:40,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:40,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:59:40,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash 403581565, now seen corresponding path program 1 times [2022-11-20 10:59:40,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:40,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140978976] [2022-11-20 10:59:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:40,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:59:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:42,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 10:59:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:42,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:59:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:59:43,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:43,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140978976] [2022-11-20 10:59:43,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140978976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:43,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38273888] [2022-11-20 10:59:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:43,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:43,267 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:43,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:59:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:43,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-20 10:59:43,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:43,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 10:59:44,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:59:44,195 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 10:59:44,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 10:59:44,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:44,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 10:59:44,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-20 10:59:44,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:59:44,785 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 32 [2022-11-20 10:59:44,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:59:44,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-20 10:59:44,805 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 7 treesize of output 3 [2022-11-20 10:59:44,980 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_878 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_878) |c_#memory_$Pointer$.offset|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_880 (Array Int Int))) (= (store |c_old(#memory_int)| |node_create_~temp~0#1.base| v_ArrVal_880) |c_#memory_int|)) (exists ((v_ArrVal_879 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_879) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-20 10:59:45,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:45,046 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 10:59:45,047 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 65 [2022-11-20 10:59:45,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:45,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 10:59:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:45,079 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 14 treesize of output 16 [2022-11-20 10:59:45,118 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-20 10:59:45,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2022-11-20 10:59:45,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:45,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:59:45,838 INFO L321 Elim1Store]: treesize reduction 128, result has 21.5 percent of original size [2022-11-20 10:59:45,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 170 treesize of output 92 [2022-11-20 10:59:45,861 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-20 10:59:45,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 88 [2022-11-20 10:59:45,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-20 10:59:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:45,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:59:45,999 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 27 [2022-11-20 10:59:46,014 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 15 treesize of output 7 [2022-11-20 10:59:46,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-20 10:59:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-20 10:59:46,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:46,177 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_885 Int) (v_ArrVal_882 (Array Int Int)) (v_ArrVal_886 Int)) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_882) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 v_ArrVal_886)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 v_ArrVal_885)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2022-11-20 10:59:47,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38273888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:47,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:47,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2022-11-20 10:59:47,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284925039] [2022-11-20 10:59:47,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:47,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 10:59:47,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 10:59:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2584, Unknown=2, NotChecked=206, Total=2970 [2022-11-20 10:59:47,098 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 49 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:59:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:50,177 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-11-20 10:59:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:59:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-11-20 10:59:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:50,179 INFO L225 Difference]: With dead ends: 47 [2022-11-20 10:59:50,179 INFO L226 Difference]: Without dead ends: 45 [2022-11-20 10:59:50,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=403, Invalid=4573, Unknown=2, NotChecked=278, Total=5256 [2022-11-20 10:59:50,182 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 133 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:50,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 286 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 699 Invalid, 0 Unknown, 38 Unchecked, 0.7s Time] [2022-11-20 10:59:50,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-20 10:59:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-11-20 10:59:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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) [2022-11-20 10:59:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-20 10:59:50,194 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 40 [2022-11-20 10:59:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:50,194 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-20 10:59:50,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:59:50,195 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-20 10:59:50,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 10:59:50,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:50,196 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:50,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 10:59:50,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:50,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1294860110, now seen corresponding path program 1 times [2022-11-20 10:59:50,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:50,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750937720] [2022-11-20 10:59:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:50,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:51,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:59:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:51,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 10:59:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:52,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:59:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:59:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:52,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750937720] [2022-11-20 10:59:52,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750937720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:52,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032485128] [2022-11-20 10:59:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:52,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:52,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:52,339 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:52,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:59:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-20 10:59:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:52,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 10:59:52,589 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 5 treesize of output 3 [2022-11-20 10:59:52,734 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 10:59:52,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 10:59:52,869 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 10:59:52,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 7 [2022-11-20 10:59:53,062 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-20 10:59:53,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 10:59:53,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 [2022-11-20 10:59:53,523 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-20 10:59:53,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 30 [2022-11-20 10:59:53,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-20 10:59:53,541 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 10:59:53,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 10:59:53,680 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_1051 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1051))) (exists ((v_ArrVal_1050 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1050))))) is different from true [2022-11-20 10:59:53,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:53,748 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 10:59:53,748 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 61 [2022-11-20 10:59:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:53,783 INFO L321 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-11-20 10:59:53,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2022-11-20 10:59:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:59:53,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 10:59:54,113 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-20 10:59:54,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 10:59:54,157 INFO L321 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2022-11-20 10:59:54,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 66 [2022-11-20 10:59:54,185 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 15 treesize of output 7 [2022-11-20 10:59:54,291 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-20 10:59:54,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 23 [2022-11-20 10:59:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-11-20 10:59:54,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:55,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032485128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:55,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:59:55,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 46 [2022-11-20 10:59:55,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307404074] [2022-11-20 10:59:55,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:55,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 10:59:55,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 10:59:55,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2394, Unknown=1, NotChecked=98, Total=2652 [2022-11-20 10:59:55,015 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 46 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 38 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:59:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:56,955 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-20 10:59:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:59:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 38 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2022-11-20 10:59:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:56,956 INFO L225 Difference]: With dead ends: 50 [2022-11-20 10:59:56,956 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 10:59:56,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=359, Invalid=4474, Unknown=1, NotChecked=136, Total=4970 [2022-11-20 10:59:56,959 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:56,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 402 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 604 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-11-20 10:59:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 10:59:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-11-20 10:59:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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) [2022-11-20 10:59:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-11-20 10:59:56,972 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 42 [2022-11-20 10:59:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:56,972 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-11-20 10:59:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 38 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:59:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-11-20 10:59:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 10:59:56,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:56,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:56,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 10:59:57,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:57,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1294861784, now seen corresponding path program 1 times [2022-11-20 10:59:57,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:57,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579545154] [2022-11-20 10:59:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:57,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:59,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 10:59:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:59,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 10:59:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:59,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:59:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:00:00,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579545154] [2022-11-20 11:00:00,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579545154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380884528] [2022-11-20 11:00:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:00,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:00,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:00,054 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:00,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:00:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:00,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-20 11:00:00,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:00,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:00:00,421 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 5 treesize of output 3 [2022-11-20 11:00:00,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:00:00,638 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:00:00,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:00:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:00,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 11:00:00,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:00:01,153 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 11:00:01,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 11:00:01,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:00:01,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-20 11:00:01,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2022-11-20 11:00:01,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 11:00:01,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:00:01,875 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 48 [2022-11-20 11:00:01,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 11:00:01,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 11:00:02,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 9 treesize of output 12 [2022-11-20 11:00:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:02,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:02,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:00:02,269 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:00:02,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 121 treesize of output 78 [2022-11-20 11:00:02,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:02,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:02,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-11-20 11:00:02,307 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-20 11:00:02,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2022-11-20 11:00:02,321 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 5 treesize of output 3 [2022-11-20 11:00:02,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:02,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:02,350 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-20 11:00:02,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2022-11-20 11:00:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:03,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:00:03,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:03,653 INFO L321 Elim1Store]: treesize reduction 197, result has 11.3 percent of original size [2022-11-20 11:00:03,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 325 treesize of output 158 [2022-11-20 11:00:03,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:03,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 88 [2022-11-20 11:00:03,703 INFO L321 Elim1Store]: treesize reduction 160, result has 12.6 percent of original size [2022-11-20 11:00:03,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 236 treesize of output 151 [2022-11-20 11:00:04,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:00:04,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:04,196 INFO L321 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2022-11-20 11:00:04,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 235 treesize of output 120 [2022-11-20 11:00:04,214 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:00:04,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 26 [2022-11-20 11:00:04,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 11:00:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:04,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:06,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:00:06,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 964 treesize of output 965 [2022-11-20 11:00:08,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380884528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:08,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:00:08,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2022-11-20 11:00:08,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745687333] [2022-11-20 11:00:08,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:08,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 11:00:08,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 11:00:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3914, Unknown=2, NotChecked=0, Total=4160 [2022-11-20 11:00:08,041 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 54 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 44 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:00:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:10,732 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-11-20 11:00:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:00:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 44 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2022-11-20 11:00:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:10,734 INFO L225 Difference]: With dead ends: 66 [2022-11-20 11:00:10,734 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 11:00:10,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=415, Invalid=5435, Unknown=2, NotChecked=0, Total=5852 [2022-11-20 11:00:10,736 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:10,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 299 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 625 Invalid, 0 Unknown, 41 Unchecked, 0.7s Time] [2022-11-20 11:00:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 11:00:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-11-20 11:00:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:00:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-11-20 11:00:10,756 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 42 [2022-11-20 11:00:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:10,756 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-11-20 11:00:10,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 44 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:00:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-11-20 11:00:10,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 11:00:10,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:10,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:10,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:00:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:10,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 848307608, now seen corresponding path program 2 times [2022-11-20 11:00:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:10,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48874164] [2022-11-20 11:00:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:12,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:00:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:12,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:00:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:12,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:00:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:00:12,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:12,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48874164] [2022-11-20 11:00:12,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48874164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:12,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897674103] [2022-11-20 11:00:12,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:00:12,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:12,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:12,930 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:12,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:00:13,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:00:13,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 163 conjunts are in the unsatisfiable core [2022-11-20 11:00:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:13,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:00:13,279 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 5 treesize of output 3 [2022-11-20 11:00:13,408 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 11:00:13,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:00:13,483 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 [2022-11-20 11:00:13,602 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 7 treesize of output 3 [2022-11-20 11:00:13,607 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:00:13,608 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 11 treesize of output 7 [2022-11-20 11:00:13,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:00:13,829 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:00:13,830 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 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 11:00:13,839 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 7 treesize of output 3 [2022-11-20 11:00:13,887 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-20 11:00:13,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 11:00:14,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:14,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 11:00:14,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-11-20 11:00:14,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 11:00:14,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:00:14,474 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 47 [2022-11-20 11:00:14,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:00:14,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 11:00:14,503 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:00:14,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 11:00:14,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:14,803 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 11:00:14,804 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 82 [2022-11-20 11:00:14,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:14,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 11:00:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:14,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:14,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:14,832 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-20 11:00:14,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 48 [2022-11-20 11:00:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:14,856 INFO L321 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-11-20 11:00:14,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 33 [2022-11-20 11:00:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:15,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 11:00:15,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:15,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:00:15,958 INFO L321 Elim1Store]: treesize reduction 115, result has 29.4 percent of original size [2022-11-20 11:00:15,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 129 treesize of output 115 [2022-11-20 11:00:16,042 INFO L321 Elim1Store]: treesize reduction 270, result has 10.6 percent of original size [2022-11-20 11:00:16,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 104 treesize of output 91 [2022-11-20 11:00:16,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:00:16,393 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 49 [2022-11-20 11:00:16,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:00:16,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 38 [2022-11-20 11:00:16,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-20 11:00:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:16,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:32,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897674103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:32,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:00:32,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28] total 46 [2022-11-20 11:00:32,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584672392] [2022-11-20 11:00:32,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:32,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-20 11:00:32,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-20 11:00:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2998, Unknown=5, NotChecked=0, Total=3192 [2022-11-20 11:00:32,152 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 46 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 37 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:00:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:36,645 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-11-20 11:00:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 11:00:36,651 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 37 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2022-11-20 11:00:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:36,653 INFO L225 Difference]: With dead ends: 91 [2022-11-20 11:00:36,653 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 11:00:36,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=565, Invalid=6912, Unknown=5, NotChecked=0, Total=7482 [2022-11-20 11:00:36,656 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 123 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:36,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 320 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 693 Invalid, 0 Unknown, 48 Unchecked, 0.8s Time] [2022-11-20 11:00:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 11:00:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2022-11-20 11:00:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:00:36,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-11-20 11:00:36,700 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 42 [2022-11-20 11:00:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:36,701 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-11-20 11:00:36,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 37 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:00:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-11-20 11:00:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:00:36,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:36,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:36,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:00:36,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:00:36,910 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:36,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1178308631, now seen corresponding path program 2 times [2022-11-20 11:00:36,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:36,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212341470] [2022-11-20 11:00:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:36,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:38,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:00:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:38,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:00:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:39,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:00:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:00:39,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:39,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212341470] [2022-11-20 11:00:39,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212341470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:39,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853972214] [2022-11-20 11:00:39,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:00:39,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:39,336 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:39,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:00:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:00:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 148 conjunts are in the unsatisfiable core [2022-11-20 11:00:39,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:39,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:00:39,639 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 5 treesize of output 3 [2022-11-20 11:00:39,826 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:00:39,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:00:40,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:00:40,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:40,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 11:00:40,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:40,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-20 11:00:40,216 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 11:00:40,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 11:00:40,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-20 11:00:40,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-20 11:00:40,865 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:00:40,865 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 37 [2022-11-20 11:00:40,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 11:00:40,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 11:00:41,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:41,155 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 11:00:41,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 70 [2022-11-20 11:00:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:41,187 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-20 11:00:41,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 33 treesize of output 33 [2022-11-20 11:00:41,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:41,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-11-20 11:00:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:42,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:00:42,233 INFO L321 Elim1Store]: treesize reduction 145, result has 11.0 percent of original size [2022-11-20 11:00:42,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 207 treesize of output 99 [2022-11-20 11:00:42,267 INFO L321 Elim1Store]: treesize reduction 112, result has 17.0 percent of original size [2022-11-20 11:00:42,267 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 203 treesize of output 146 [2022-11-20 11:00:42,580 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:00:42,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 116 [2022-11-20 11:00:42,862 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:00:42,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 47 [2022-11-20 11:00:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:00:42,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:45,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853972214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:45,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:00:45,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2022-11-20 11:00:45,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419019853] [2022-11-20 11:00:45,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:45,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 11:00:45,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:45,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 11:00:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3818, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 11:00:45,337 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 53 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 44 states have internal predecessors, (70), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:00:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:48,861 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-11-20 11:00:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:00:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 44 states have internal predecessors, (70), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2022-11-20 11:00:48,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:48,862 INFO L225 Difference]: With dead ends: 77 [2022-11-20 11:00:48,862 INFO L226 Difference]: Without dead ends: 74 [2022-11-20 11:00:48,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=422, Invalid=6220, Unknown=0, NotChecked=0, Total=6642 [2022-11-20 11:00:48,865 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:48,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 543 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 715 Invalid, 0 Unknown, 33 Unchecked, 0.7s Time] [2022-11-20 11:00:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-20 11:00:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2022-11-20 11:00:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:00:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-11-20 11:00:48,887 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 44 [2022-11-20 11:00:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:48,888 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-11-20 11:00:48,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 44 states have internal predecessors, (70), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:00:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-11-20 11:00:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:00:48,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:48,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:48,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 11:00:49,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:49,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:00:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:49,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1178306957, now seen corresponding path program 2 times [2022-11-20 11:00:49,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:49,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834690859] [2022-11-20 11:00:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:51,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:00:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:51,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:00:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:51,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 11:00:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:00:52,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:52,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834690859] [2022-11-20 11:00:52,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834690859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:52,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116273473] [2022-11-20 11:00:52,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:00:52,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:52,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:52,015 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:52,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c32e906-b37f-4a86-a61c-960f1b8507bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:00:52,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:00:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:52,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 168 conjunts are in the unsatisfiable core [2022-11-20 11:00:52,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:52,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 [2022-11-20 11:00:52,384 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 5 treesize of output 3 [2022-11-20 11:00:52,594 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:00:52,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:00:52,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-20 11:00:52,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-20 11:00:52,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 11:00:52,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:00:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:53,203 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:00:53,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2022-11-20 11:00:53,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:00:53,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:00:53,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 11:00:53,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:53,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 11:00:53,953 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-20 11:00:53,953 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 53 [2022-11-20 11:00:53,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:53,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 11:00:53,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:53,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 11:00:54,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:00:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:54,278 INFO L321 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-20 11:00:54,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 93 [2022-11-20 11:00:54,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:54,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:54,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:54,323 INFO L321 Elim1Store]: treesize reduction 44, result has 49.4 percent of original size [2022-11-20 11:00:54,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 68 [2022-11-20 11:00:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:54,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:54,371 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-20 11:00:54,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2022-11-20 11:00:55,397 INFO L321 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2022-11-20 11:00:55,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 125 treesize of output 90 [2022-11-20 11:00:55,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:00:55,469 INFO L321 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2022-11-20 11:00:55,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2022-11-20 11:00:55,500 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-20 11:00:55,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 32 [2022-11-20 11:00:55,510 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 5 treesize of output 3 [2022-11-20 11:01:01,267 INFO L321 Elim1Store]: treesize reduction 402, result has 71.1 percent of original size [2022-11-20 11:01:01,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 21 new quantified variables, introduced 105 case distinctions, treesize of input 610 treesize of output 1270 [2022-11-20 11:01:01,499 INFO L217 Elim1Store]: Index analysis took 102 ms [2022-11-20 11:01:06,193 INFO L321 Elim1Store]: treesize reduction 372, result has 69.6 percent of original size [2022-11-20 11:01:06,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 18 new quantified variables, introduced 105 case distinctions, treesize of input 622 treesize of output 1309