./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8 --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 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 --- 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-e04fb08 [2022-11-16 11:29:13,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:29:13,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:29:13,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:29:13,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:29:13,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:29:13,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:29:13,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:29:13,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:29:13,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:29:13,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:29:13,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:29:13,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:29:13,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:29:13,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:29:13,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:29:13,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:29:13,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:29:13,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:29:13,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:29:13,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:29:13,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:29:13,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:29:13,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:29:13,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:29:13,193 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:29:13,193 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:29:13,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:29:13,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:29:13,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:29:13,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:29:13,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:29:13,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:29:13,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:29:13,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:29:13,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:29:13,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:29:13,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:29:13,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:29:13,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:29:13,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:29:13,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:29:13,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:29:13,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:29:13,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:29:13,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:29:13,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:29:13,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:29:13,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:29:13,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:29:13,230 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:29:13,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:29:13,231 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:29:13,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:29:13,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:29:13,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:29:13,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:29:13,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:29:13,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:29:13,232 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:29:13,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:29:13,232 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:29:13,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:29:13,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:29:13,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:29:13,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:29:13,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:29:13,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:29:13,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:29:13,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:29:13,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:29:13,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:29:13,235 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:29:13,235 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:29:13,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:29:13,236 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_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 [2022-11-16 11:29:13,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:29:13,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:29:13,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:29:13,528 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:29:13,535 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:29:13,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2022-11-16 11:29:13,637 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/data/6b9955efd/16554ec8c51149339bcc1d057c3ede3c/FLAGe8a53aafe [2022-11-16 11:29:14,105 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:29:14,106 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2022-11-16 11:29:14,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/data/6b9955efd/16554ec8c51149339bcc1d057c3ede3c/FLAGe8a53aafe [2022-11-16 11:29:14,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/data/6b9955efd/16554ec8c51149339bcc1d057c3ede3c [2022-11-16 11:29:14,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:29:14,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:29:14,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:29:14,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:29:14,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:29:14,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b200c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14, skipping insertion in model container [2022-11-16 11:29:14,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:29:14,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:29:14,690 WARN L229 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_96a591da-12c3-4b00-96e6-741618618351/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2022-11-16 11:29:14,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:29:14,712 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:29:14,728 WARN L229 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_96a591da-12c3-4b00-96e6-741618618351/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2022-11-16 11:29:14,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:29:14,764 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:29:14,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14 WrapperNode [2022-11-16 11:29:14,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:29:14,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:29:14,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:29:14,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:29:14,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,814 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2022-11-16 11:29:14,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:29:14,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:29:14,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:29:14,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:29:14,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,834 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:29:14,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:29:14,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:29:14,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:29:14,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (1/1) ... [2022-11-16 11:29:14,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:29:14,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:14,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:29:14,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:29:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:29:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:29:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:29:14,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:29:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:29:14,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:29:15,041 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:29:15,044 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:29:15,254 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:29:15,261 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:29:15,262 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:29:15,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:29:15 BoogieIcfgContainer [2022-11-16 11:29:15,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:29:15,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:29:15,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:29:15,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:29:15,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:29:14" (1/3) ... [2022-11-16 11:29:15,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48448611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:29:15, skipping insertion in model container [2022-11-16 11:29:15,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:29:14" (2/3) ... [2022-11-16 11:29:15,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48448611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:29:15, skipping insertion in model container [2022-11-16 11:29:15,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:29:15" (3/3) ... [2022-11-16 11:29:15,273 INFO L112 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2022-11-16 11:29:15,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:29:15,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:29:15,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:29:15,348 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;@44abaf04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:29:15,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:29:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:29:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:29:15,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:15,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:15,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash -167421905, now seen corresponding path program 1 times [2022-11-16 11:29:15,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:15,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37371209] [2022-11-16 11:29:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:15,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:15,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:15,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37371209] [2022-11-16 11:29:15,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37371209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:15,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:15,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:29:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916508545] [2022-11-16 11:29:15,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:15,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:29:15,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:29:15,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:29:15,636 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:15,659 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2022-11-16 11:29:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:29:15,661 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:29:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:15,669 INFO L225 Difference]: With dead ends: 56 [2022-11-16 11:29:15,669 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 11:29:15,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:29:15,677 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:15,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:29:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 11:29:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-16 11:29:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 11:29:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-16 11:29:15,722 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 11 [2022-11-16 11:29:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:15,723 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-16 11:29:15,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-16 11:29:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:29:15,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:15,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:15,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:29:15,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1482831489, now seen corresponding path program 1 times [2022-11-16 11:29:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:15,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722406057] [2022-11-16 11:29:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:15,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722406057] [2022-11-16 11:29:15,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722406057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:15,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:15,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:29:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67870322] [2022-11-16 11:29:15,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:15,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:29:15,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:29:15,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:29:15,939 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:16,027 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-11-16 11:29:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:29:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:29:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:16,036 INFO L225 Difference]: With dead ends: 32 [2022-11-16 11:29:16,037 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 11:29:16,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:29:16,039 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:16,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 69 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:29:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 11:29:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-16 11:29:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 11:29:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-16 11:29:16,058 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-11-16 11:29:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:16,059 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-16 11:29:16,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-16 11:29:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:29:16,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:16,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:16,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:29:16,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2126947644, now seen corresponding path program 1 times [2022-11-16 11:29:16,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427079185] [2022-11-16 11:29:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:16,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:29:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:16,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:16,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427079185] [2022-11-16 11:29:16,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427079185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:16,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:16,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:29:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243326397] [2022-11-16 11:29:16,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:16,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:29:16,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:16,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:29:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:29:16,377 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:29:16,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:16,498 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-11-16 11:29:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:29:16,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-16 11:29:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:16,500 INFO L225 Difference]: With dead ends: 45 [2022-11-16 11:29:16,500 INFO L226 Difference]: Without dead ends: 43 [2022-11-16 11:29:16,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:29:16,502 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:16,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 97 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:29:16,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-16 11:29:16,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-11-16 11:29:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 28 states have internal predecessors, (30), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 11:29:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-11-16 11:29:16,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 17 [2022-11-16 11:29:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:16,517 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-11-16 11:29:16,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:29:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-11-16 11:29:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:29:16,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:16,519 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:16,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:29:16,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:16,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2018842485, now seen corresponding path program 1 times [2022-11-16 11:29:16,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:16,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456439512] [2022-11-16 11:29:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:16,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:16,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:29:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:16,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 11:29:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:29:16,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:16,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456439512] [2022-11-16 11:29:16,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456439512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:16,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:16,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:29:16,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427565266] [2022-11-16 11:29:16,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:16,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:29:16,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:29:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:29:16,674 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:29:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:16,828 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-11-16 11:29:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:29:16,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-16 11:29:16,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:16,830 INFO L225 Difference]: With dead ends: 52 [2022-11-16 11:29:16,830 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 11:29:16,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:29:16,832 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:16,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:29:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 11:29:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-11-16 11:29:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 11:29:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-16 11:29:16,889 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2022-11-16 11:29:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:16,889 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-16 11:29:16,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 11:29:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-16 11:29:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:29:16,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:16,891 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:16,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:29:16,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1644488141, now seen corresponding path program 1 times [2022-11-16 11:29:16,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:16,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595213019] [2022-11-16 11:29:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:16,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:29:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-16 11:29:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 11:29:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:29:17,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595213019] [2022-11-16 11:29:17,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595213019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:17,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:17,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:29:17,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325521389] [2022-11-16 11:29:17,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:17,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:29:17,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:29:17,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:29:17,056 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:29:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:17,220 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-11-16 11:29:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:29:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-16 11:29:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:17,222 INFO L225 Difference]: With dead ends: 71 [2022-11-16 11:29:17,223 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 11:29:17,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:29:17,225 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 44 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:17,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 99 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:29:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 11:29:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-11-16 11:29:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 11:29:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-11-16 11:29:17,240 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2022-11-16 11:29:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:17,240 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-11-16 11:29:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:29:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-11-16 11:29:17,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:29:17,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:17,242 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:17,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:29:17,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:17,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1722491344, now seen corresponding path program 1 times [2022-11-16 11:29:17,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:17,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803980486] [2022-11-16 11:29:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:17,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:29:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 11:29:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:29:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:29:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:17,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803980486] [2022-11-16 11:29:17,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803980486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:29:17,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:29:17,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:29:17,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426930264] [2022-11-16 11:29:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:29:17,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:29:17,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:29:17,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:29:17,405 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:29:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:17,579 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-11-16 11:29:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:29:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-16 11:29:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:17,583 INFO L225 Difference]: With dead ends: 73 [2022-11-16 11:29:17,583 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 11:29:17,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:29:17,596 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:17,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 146 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:29:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 11:29:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-11-16 11:29:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.119047619047619) internal successors, (47), 45 states have internal predecessors, (47), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 11:29:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-11-16 11:29:17,621 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 30 [2022-11-16 11:29:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:17,621 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-11-16 11:29:17,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:29:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-11-16 11:29:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 11:29:17,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:17,623 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:17,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:29:17,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:17,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:17,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1030091550, now seen corresponding path program 1 times [2022-11-16 11:29:17,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:17,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395056522] [2022-11-16 11:29:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:17,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:29:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 11:29:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:29:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:29:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-16 11:29:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-16 11:29:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-16 11:29:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 11:29:17,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:17,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395056522] [2022-11-16 11:29:17,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395056522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:29:17,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334562326] [2022-11-16 11:29:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:17,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:17,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:17,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:18,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:29:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:18,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:29:18,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 11:29:18,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 11:29:18,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334562326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:18,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:29:18,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 19 [2022-11-16 11:29:18,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229041736] [2022-11-16 11:29:18,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:18,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:29:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:29:18,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:29:18,675 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-16 11:29:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:19,427 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-11-16 11:29:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:29:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 53 [2022-11-16 11:29:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:19,431 INFO L225 Difference]: With dead ends: 108 [2022-11-16 11:29:19,431 INFO L226 Difference]: Without dead ends: 93 [2022-11-16 11:29:19,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:29:19,433 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:19,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 140 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:29:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-16 11:29:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-11-16 11:29:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 58 states have internal predecessors, (60), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-16 11:29:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-11-16 11:29:19,451 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 53 [2022-11-16 11:29:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:19,452 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-11-16 11:29:19,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-16 11:29:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-11-16 11:29:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:29:19,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:19,454 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:19,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:19,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:29:19,660 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash 302113055, now seen corresponding path program 1 times [2022-11-16 11:29:19,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:19,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762529321] [2022-11-16 11:29:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:19,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:29:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 11:29:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:29:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:29:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 11:29:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 11:29:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 11:29:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 11:29:19,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:19,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762529321] [2022-11-16 11:29:19,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762529321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:29:19,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476811860] [2022-11-16 11:29:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:19,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:19,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:19,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:19,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:29:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:19,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:29:19,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 11:29:20,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-16 11:29:20,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476811860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:20,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:29:20,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-16 11:29:20,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999621796] [2022-11-16 11:29:20,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:20,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:29:20,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:20,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:29:20,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:29:20,299 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-16 11:29:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:20,502 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2022-11-16 11:29:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:29:20,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 55 [2022-11-16 11:29:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:20,507 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:29:20,508 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 11:29:20,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:29:20,512 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 82 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:20,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 200 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:29:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 11:29:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-16 11:29:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 61 states have internal predecessors, (63), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-16 11:29:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2022-11-16 11:29:20,548 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 55 [2022-11-16 11:29:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:20,550 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2022-11-16 11:29:20,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-16 11:29:20,550 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2022-11-16 11:29:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 11:29:20,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:20,556 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:20,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:20,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:20,765 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:20,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash 847231248, now seen corresponding path program 2 times [2022-11-16 11:29:20,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:20,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758284595] [2022-11-16 11:29:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:20,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:29:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 11:29:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:29:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:29:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 11:29:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 11:29:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 11:29:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 11:29:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 11:29:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:29:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 11:29:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 24 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-16 11:29:21,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:21,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758284595] [2022-11-16 11:29:21,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758284595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:29:21,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417575298] [2022-11-16 11:29:21,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:29:21,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:21,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:21,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:21,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:29:21,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:29:21,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:21,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:29:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:29:21,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:29:21,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417575298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:21,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:29:21,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 28 [2022-11-16 11:29:21,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513311092] [2022-11-16 11:29:21,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:21,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:29:21,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:29:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:29:21,929 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 28 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-16 11:29:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:22,952 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2022-11-16 11:29:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:29:22,953 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) Word has length 80 [2022-11-16 11:29:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:22,954 INFO L225 Difference]: With dead ends: 109 [2022-11-16 11:29:22,954 INFO L226 Difference]: Without dead ends: 107 [2022-11-16 11:29:22,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:29:22,956 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 186 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:22,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 98 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:29:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-16 11:29:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2022-11-16 11:29:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-16 11:29:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2022-11-16 11:29:22,980 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 80 [2022-11-16 11:29:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:22,981 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2022-11-16 11:29:22,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-16 11:29:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2022-11-16 11:29:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 11:29:22,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:29:22,983 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:22,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:23,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:23,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:29:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:29:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1329001986, now seen corresponding path program 2 times [2022-11-16 11:29:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:29:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317961609] [2022-11-16 11:29:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:29:23,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:29:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 11:29:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 11:29:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:29:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:29:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-16 11:29:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-16 11:29:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-16 11:29:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-16 11:29:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-16 11:29:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:29:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 11:29:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 11:29:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-16 11:29:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-16 11:29:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-16 11:29:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:29:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 31 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-11-16 11:29:23,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:23,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317961609] [2022-11-16 11:29:23,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317961609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:29:23,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799381199] [2022-11-16 11:29:23,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:29:23,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:29:23,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:29:23,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:29:23,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:29:23,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:29:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:29:23,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:29:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:29:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 64 proven. 69 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-11-16 11:29:23,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 71 proven. 62 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-11-16 11:29:24,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799381199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:24,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:29:24,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 16 [2022-11-16 11:29:24,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857024302] [2022-11-16 11:29:24,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:24,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:29:24,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:29:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:29:24,272 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-16 11:29:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:29:24,659 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-11-16 11:29:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:29:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2022-11-16 11:29:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:29:24,663 INFO L225 Difference]: With dead ends: 96 [2022-11-16 11:29:24,663 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 11:29:24,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 227 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:29:24,665 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:29:24,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 166 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:29:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 11:29:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 11:29:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:29:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 11:29:24,666 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2022-11-16 11:29:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:29:24,667 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 11:29:24,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-16 11:29:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 11:29:24,667 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 11:29:24,669 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 11:29:24,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:29:24,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:29:24,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 11:29:25,808 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-11-16 11:29:25,808 INFO L899 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2022-11-16 11:29:25,809 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (let ((.cse0 (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2022-11-16 11:29:25,809 INFO L895 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (let ((.cse0 (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2022-11-16 11:29:25,809 INFO L899 garLoopResultBuilder]: For program point L44(lines 44 45) no Hoare annotation was computed. [2022-11-16 11:29:25,809 INFO L899 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2022-11-16 11:29:25,809 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-16 11:29:25,810 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-16 11:29:25,810 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-16 11:29:25,810 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-11-16 11:29:25,810 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) .cse0 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) .cse1 .cse2) (and (<= 3 |ULTIMATE.start_main_~inlen~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse2 (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2022-11-16 11:29:25,811 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 3) |ULTIMATE.start_main_~bufferlen~0#1|)) (and (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2022-11-16 11:29:25,811 INFO L895 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 3) |ULTIMATE.start_main_~bufferlen~0#1|)) (and (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2022-11-16 11:29:25,811 INFO L899 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2022-11-16 11:29:25,811 INFO L895 garLoopResultBuilder]: At program point L37-3(lines 37 48) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) .cse0 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) .cse1 .cse2) (and (<= 3 |ULTIMATE.start_main_~inlen~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse2 (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2022-11-16 11:29:25,812 INFO L899 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-11-16 11:29:25,812 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-16 11:29:25,812 INFO L899 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2022-11-16 11:29:25,812 INFO L895 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (<= 1 |ULTIMATE.start_main_~in~0#1|) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)) [2022-11-16 11:29:25,812 INFO L895 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (<= 1 |ULTIMATE.start_main_~in~0#1|) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)) [2022-11-16 11:29:25,813 INFO L899 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2022-11-16 11:29:25,813 INFO L902 garLoopResultBuilder]: At program point L55(lines 25 56) the Hoare annotation is: true [2022-11-16 11:29:25,813 INFO L902 garLoopResultBuilder]: At program point L55-1(lines 24 56) the Hoare annotation is: true [2022-11-16 11:29:25,813 INFO L895 garLoopResultBuilder]: At program point L47(lines 37 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (< 0 (+ |ULTIMATE.start_main_~buflim~0#1| 1)) (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)))) [2022-11-16 11:29:25,813 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2022-11-16 11:29:25,814 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-11-16 11:29:25,814 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-11-16 11:29:25,814 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-11-16 11:29:25,814 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-11-16 11:29:25,814 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-11-16 11:29:25,814 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-11-16 11:29:25,818 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:29:25,821 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 11:29:25,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 11:29:25 BoogieIcfgContainer [2022-11-16 11:29:25,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 11:29:25,848 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 11:29:25,848 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 11:29:25,849 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 11:29:25,849 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:29:15" (3/4) ... [2022-11-16 11:29:25,853 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 11:29:25,860 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-16 11:29:25,864 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-16 11:29:25,864 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-16 11:29:25,864 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 11:29:25,864 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 11:29:25,897 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 11:29:25,897 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 11:29:25,898 INFO L158 Benchmark]: Toolchain (without parser) took 11420.65ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 73.9MB in the beginning and 120.3MB in the end (delta: -46.4MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2022-11-16 11:29:25,899 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory was 81.0MB in the beginning and 80.9MB in the end (delta: 28.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:29:25,899 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.40ms. Allocated memory is still 109.1MB. Free memory was 73.6MB in the beginning and 83.2MB in the end (delta: -9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:29:25,899 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.58ms. Allocated memory is still 109.1MB. Free memory was 83.2MB in the beginning and 81.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:29:25,900 INFO L158 Benchmark]: Boogie Preprocessor took 21.82ms. Allocated memory is still 109.1MB. Free memory was 81.5MB in the beginning and 80.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:29:25,900 INFO L158 Benchmark]: RCFGBuilder took 426.60ms. Allocated memory is still 109.1MB. Free memory was 80.3MB in the beginning and 69.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:29:25,901 INFO L158 Benchmark]: TraceAbstraction took 10582.03ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 69.0MB in the beginning and 123.5MB in the end (delta: -54.5MB). Peak memory consumption was 79.1MB. Max. memory is 16.1GB. [2022-11-16 11:29:25,901 INFO L158 Benchmark]: Witness Printer took 49.41ms. Allocated memory is still 159.4MB. Free memory was 123.5MB in the beginning and 120.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-16 11:29:25,904 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory was 81.0MB in the beginning and 80.9MB in the end (delta: 28.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.40ms. Allocated memory is still 109.1MB. Free memory was 73.6MB in the beginning and 83.2MB in the end (delta: -9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.58ms. Allocated memory is still 109.1MB. Free memory was 83.2MB in the beginning and 81.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.82ms. Allocated memory is still 109.1MB. Free memory was 81.5MB in the beginning and 80.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 426.60ms. Allocated memory is still 109.1MB. Free memory was 80.3MB in the beginning and 69.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10582.03ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 69.0MB in the beginning and 123.5MB in the end (delta: -54.5MB). Peak memory consumption was 79.1MB. Max. memory is 16.1GB. * Witness Printer took 49.41ms. Allocated memory is still 159.4MB. Free memory was 123.5MB in the beginning and 120.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.5s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 577 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 537 mSDsluCounter, 1245 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 914 mSDsCounter, 527 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1715 IncrementalHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 527 mSolverCounterUnsat, 331 mSDtfsCounter, 1715 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 801 GetRequests, 639 SyntacticMatches, 17 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=9, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 57 PreInvPairs, 102 NumberOfFragments, 376 HoareAnnotationTreeSize, 57 FomulaSimplifications, 414 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 2116 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 705 NumberOfCodeBlocks, 705 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 978 ConstructedInterpolants, 0 QuantifiedInterpolants, 3506 SizeOfPredicates, 20 NumberOfNonLiveVariables, 616 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2550/2923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((0 < buflim + 1 && buf == 0) && bufferlen == 2 + buflim) && bufferlen < inlen) && in == 0) || (((((bufferlen + in + 1 <= buf + inlen && bufferlen == 2 + buflim) && 1 <= in) && bufferlen < inlen) && buf + 2 <= bufferlen) && 0 <= buf) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-16 11:29:25,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96a591da-12c3-4b00-96e6-741618618351/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE