./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- 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-5e519f3 [2022-11-03 01:56:44,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:56:44,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:56:44,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:56:44,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:56:44,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:56:44,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:56:44,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:56:44,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:56:44,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:56:44,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:56:44,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:56:44,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:56:44,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:56:44,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:56:44,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:56:44,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:56:44,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:56:44,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:56:44,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:56:44,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:56:44,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:56:44,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:56:44,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:56:44,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:56:44,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:56:44,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:56:44,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:56:44,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:56:44,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:56:44,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:56:44,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:56:44,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:56:44,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:56:44,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:56:44,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:56:44,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:56:44,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:56:44,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:56:44,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:56:44,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:56:44,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:56:44,644 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:56:44,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:56:44,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:56:44,645 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:56:44,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:56:44,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:56:44,646 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:56:44,647 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:56:44,647 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:56:44,647 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:56:44,647 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:56:44,648 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:56:44,648 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:56:44,648 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:56:44,648 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:56:44,649 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:56:44,649 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:56:44,649 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:56:44,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:56:44,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:56:44,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:56:44,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:56:44,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:56:44,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:56:44,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:56:44,652 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:56:44,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:56:44,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:56:44,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:56:44,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:44,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:56:44,654 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:56:44,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:56:44,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:56:44,654 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:56:44,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:56:44,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:56:44,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:56:44,655 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_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2022-11-03 01:56:44,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:56:44,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:56:44,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:56:44,964 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:56:44,965 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:56:44,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-03 01:56:45,040 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/data/466645cb1/c8cf49191476435496de7be40d8e4c01/FLAG1e48a7018 [2022-11-03 01:56:45,874 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:56:45,874 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-03 01:56:45,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/data/466645cb1/c8cf49191476435496de7be40d8e4c01/FLAG1e48a7018 [2022-11-03 01:56:46,013 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/data/466645cb1/c8cf49191476435496de7be40d8e4c01 [2022-11-03 01:56:46,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:56:46,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:56:46,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:46,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:56:46,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:56:46,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:46" (1/1) ... [2022-11-03 01:56:46,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55072890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:46, skipping insertion in model container [2022-11-03 01:56:46,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:46" (1/1) ... [2022-11-03 01:56:46,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:56:46,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:56:46,955 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-03 01:56:47,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:47,606 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:56:47,745 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-03 01:56:47,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:47,979 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:56:47,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47 WrapperNode [2022-11-03 01:56:47,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:47,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:47,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:56:47,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:56:47,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,153 INFO L138 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2002 [2022-11-03 01:56:48,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:48,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:56:48,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:56:48,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:56:48,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,260 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:56:48,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:56:48,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:56:48,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:56:48,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:48,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:48,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:48,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:56:48,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2022-11-03 01:56:48,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2022-11-03 01:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 01:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-03 01:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 01:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 01:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 01:56:48,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 01:56:48,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:56:48,376 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-03 01:56:48,376 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-03 01:56:48,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 01:56:48,376 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 01:56:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-03 01:56:48,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-03 01:56:48,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 01:56:48,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 01:56:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 01:56:48,378 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 01:56:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2022-11-03 01:56:48,378 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2022-11-03 01:56:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-03 01:56:48,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-03 01:56:48,379 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 01:56:48,379 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 01:56:48,379 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2022-11-03 01:56:48,379 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2022-11-03 01:56:48,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:56:48,379 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2022-11-03 01:56:48,379 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2022-11-03 01:56:48,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 01:56:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 01:56:48,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 01:56:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 01:56:48,380 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 01:56:48,380 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 01:56:48,380 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:56:48,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:56:48,381 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 01:56:48,381 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 01:56:48,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:56:48,381 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-03 01:56:48,382 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-03 01:56:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2022-11-03 01:56:48,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2022-11-03 01:56:48,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:56:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2022-11-03 01:56:48,383 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2022-11-03 01:56:48,383 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2022-11-03 01:56:48,384 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2022-11-03 01:56:48,384 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-03 01:56:48,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-03 01:56:48,386 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2022-11-03 01:56:48,386 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2022-11-03 01:56:48,386 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2022-11-03 01:56:48,386 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2022-11-03 01:56:48,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:56:48,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:56:48,387 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-03 01:56:48,387 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-03 01:56:48,387 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2022-11-03 01:56:48,387 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2022-11-03 01:56:48,388 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-03 01:56:48,388 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-03 01:56:48,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:56:48,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-03 01:56:48,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-03 01:56:48,388 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2022-11-03 01:56:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2022-11-03 01:56:48,389 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-03 01:56:48,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-03 01:56:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:56:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-03 01:56:48,390 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-03 01:56:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:56:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-03 01:56:48,390 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-03 01:56:48,390 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2022-11-03 01:56:48,391 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2022-11-03 01:56:48,391 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 01:56:48,391 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 01:56:48,392 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 01:56:48,392 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 01:56:48,392 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 01:56:48,392 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 01:56:48,392 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 01:56:48,392 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 01:56:48,393 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 01:56:48,393 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 01:56:48,394 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 01:56:48,394 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 01:56:48,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:56:48,395 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-03 01:56:48,395 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-03 01:56:48,395 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-11-03 01:56:48,395 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-11-03 01:56:48,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 01:56:48,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 01:56:48,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 01:56:48,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:56:48,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:56:48,396 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-03 01:56:48,396 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-03 01:56:48,980 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:56:48,983 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:56:49,227 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 01:56:50,558 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:56:50,983 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:56:50,983 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 01:56:50,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:50 BoogieIcfgContainer [2022-11-03 01:56:50,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:56:51,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:56:51,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:56:51,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:56:51,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:56:46" (1/3) ... [2022-11-03 01:56:51,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62122535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:51, skipping insertion in model container [2022-11-03 01:56:51,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (2/3) ... [2022-11-03 01:56:51,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62122535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:51, skipping insertion in model container [2022-11-03 01:56:51,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:50" (3/3) ... [2022-11-03 01:56:51,008 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-03 01:56:51,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:56:51,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:56:51,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:56:51,152 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=FINITE_AUTOMATA, 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;@576381eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:56:51,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:56:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 555 states, 359 states have (on average 1.392757660167131) internal successors, (500), 375 states have internal predecessors, (500), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-03 01:56:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 01:56:51,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:51,192 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1] [2022-11-03 01:56:51,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash -780975666, now seen corresponding path program 1 times [2022-11-03 01:56:51,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:51,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864006624] [2022-11-03 01:56:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:56:51,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:51,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864006624] [2022-11-03 01:56:51,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864006624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:51,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:51,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:51,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996403028] [2022-11-03 01:56:51,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:51,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:51,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:51,814 INFO L87 Difference]: Start difference. First operand has 555 states, 359 states have (on average 1.392757660167131) internal successors, (500), 375 states have internal predecessors, (500), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 01:56:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:52,723 INFO L93 Difference]: Finished difference Result 1610 states and 2376 transitions. [2022-11-03 01:56:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:52,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-03 01:56:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:52,755 INFO L225 Difference]: With dead ends: 1610 [2022-11-03 01:56:52,760 INFO L226 Difference]: Without dead ends: 1052 [2022-11-03 01:56:52,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:52,782 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 733 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:52,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 1510 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:56:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-03 01:56:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2022-11-03 01:56:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 690 states have (on average 1.3695652173913044) internal successors, (945), 708 states have internal predecessors, (945), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-11-03 01:56:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1502 transitions. [2022-11-03 01:56:52,956 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1502 transitions. Word has length 46 [2022-11-03 01:56:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:52,956 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 1502 transitions. [2022-11-03 01:56:52,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 01:56:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1502 transitions. [2022-11-03 01:56:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 01:56:52,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:52,960 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1] [2022-11-03 01:56:52,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:56:52,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:52,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1893934054, now seen corresponding path program 1 times [2022-11-03 01:56:52,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:52,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422424203] [2022-11-03 01:56:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:52,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:53,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:56:53,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631431936] [2022-11-03 01:56:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:53,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:53,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:53,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:53,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:56:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:56:53,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:56:53,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:53,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:53,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422424203] [2022-11-03 01:56:53,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:56:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631431936] [2022-11-03 01:56:53,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631431936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:53,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:53,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:56:53,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009763838] [2022-11-03 01:56:53,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:53,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:56:53,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:56:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:56:53,558 INFO L87 Difference]: Start difference. First operand 1052 states and 1502 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:56:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:54,241 INFO L93 Difference]: Finished difference Result 2093 states and 3044 transitions. [2022-11-03 01:56:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:56:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-11-03 01:56:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:54,291 INFO L225 Difference]: With dead ends: 2093 [2022-11-03 01:56:54,291 INFO L226 Difference]: Without dead ends: 2075 [2022-11-03 01:56:54,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:54,294 INFO L413 NwaCegarLoop]: 850 mSDtfsCounter, 763 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:54,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 2391 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:56:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-11-03 01:56:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2067. [2022-11-03 01:56:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1355 states have (on average 1.3712177121771219) internal successors, (1858), 1391 states have internal predecessors, (1858), 547 states have call successors, (547), 165 states have call predecessors, (547), 164 states have return successors, (602), 538 states have call predecessors, (602), 546 states have call successors, (602) [2022-11-03 01:56:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3007 transitions. [2022-11-03 01:56:54,439 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3007 transitions. Word has length 46 [2022-11-03 01:56:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:54,440 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 3007 transitions. [2022-11-03 01:56:54,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-03 01:56:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3007 transitions. [2022-11-03 01:56:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 01:56:54,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:54,448 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 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, 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] [2022-11-03 01:56:54,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:54,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:54,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash 2011532401, now seen corresponding path program 1 times [2022-11-03 01:56:54,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:54,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556425661] [2022-11-03 01:56:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:54,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:54,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556425661] [2022-11-03 01:56:54,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:56:54,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513798501] [2022-11-03 01:56:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:54,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:54,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:54,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:54,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:56:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:56:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:56:55,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:55,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513798501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:55,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:55,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:55,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770762066] [2022-11-03 01:56:55,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:55,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:55,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:55,244 INFO L87 Difference]: Start difference. First operand 2067 states and 3007 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:56:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:56,093 INFO L93 Difference]: Finished difference Result 5833 states and 8456 transitions. [2022-11-03 01:56:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:56,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-11-03 01:56:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:56,122 INFO L225 Difference]: With dead ends: 5833 [2022-11-03 01:56:56,122 INFO L226 Difference]: Without dead ends: 3777 [2022-11-03 01:56:56,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:56,144 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 627 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:56,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1418 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:56:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2022-11-03 01:56:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3771. [2022-11-03 01:56:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 2512 states have (on average 1.3730095541401275) internal successors, (3449), 2573 states have internal predecessors, (3449), 946 states have call successors, (946), 313 states have call predecessors, (946), 312 states have return successors, (1021), 932 states have call predecessors, (1021), 945 states have call successors, (1021) [2022-11-03 01:56:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 5416 transitions. [2022-11-03 01:56:56,359 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 5416 transitions. Word has length 77 [2022-11-03 01:56:56,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:56,360 INFO L495 AbstractCegarLoop]: Abstraction has 3771 states and 5416 transitions. [2022-11-03 01:56:56,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:56:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 5416 transitions. [2022-11-03 01:56:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 01:56:56,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:56,367 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:56,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:56,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 01:56:56,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:56,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:56,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1389648940, now seen corresponding path program 1 times [2022-11-03 01:56:56,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:56,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385314945] [2022-11-03 01:56:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:56,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:56,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:56,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385314945] [2022-11-03 01:56:56,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:56:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172759764] [2022-11-03 01:56:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:56,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:56,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:56,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:56:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:56:57,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:56:57,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:57,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172759764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:57,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:57,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896315724] [2022-11-03 01:56:57,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:57,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:57,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:57,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:57,304 INFO L87 Difference]: Start difference. First operand 3771 states and 5416 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 01:56:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:58,185 INFO L93 Difference]: Finished difference Result 10415 states and 14928 transitions. [2022-11-03 01:56:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 88 [2022-11-03 01:56:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:58,230 INFO L225 Difference]: With dead ends: 10415 [2022-11-03 01:56:58,230 INFO L226 Difference]: Without dead ends: 6655 [2022-11-03 01:56:58,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:58,247 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 612 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:58,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1428 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:56:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2022-11-03 01:56:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 6639. [2022-11-03 01:56:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 4516 states have (on average 1.3768821966341895) internal successors, (6218), 4629 states have internal predecessors, (6218), 1548 states have call successors, (1548), 575 states have call predecessors, (1548), 574 states have return successors, (1683), 1510 states have call predecessors, (1683), 1547 states have call successors, (1683) [2022-11-03 01:56:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 9449 transitions. [2022-11-03 01:56:58,627 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 9449 transitions. Word has length 88 [2022-11-03 01:56:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:58,629 INFO L495 AbstractCegarLoop]: Abstraction has 6639 states and 9449 transitions. [2022-11-03 01:56:58,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 01:56:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 9449 transitions. [2022-11-03 01:56:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 01:56:58,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:58,637 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:58,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:58,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:58,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:58,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash 182102992, now seen corresponding path program 1 times [2022-11-03 01:56:58,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:58,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658557179] [2022-11-03 01:56:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:58,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:58,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658557179] [2022-11-03 01:56:58,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:56:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863341670] [2022-11-03 01:56:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:58,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:58,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:58,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:59,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:56:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:56:59,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:56:59,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:59,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863341670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:59,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:59,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691403936] [2022-11-03 01:56:59,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:59,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:59,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:59,517 INFO L87 Difference]: Start difference. First operand 6639 states and 9449 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:57:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:00,404 INFO L93 Difference]: Finished difference Result 17063 states and 24236 transitions. [2022-11-03 01:57:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:00,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-11-03 01:57:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:00,467 INFO L225 Difference]: With dead ends: 17063 [2022-11-03 01:57:00,468 INFO L226 Difference]: Without dead ends: 10435 [2022-11-03 01:57:00,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:00,492 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 538 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:00,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1577 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2022-11-03 01:57:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10422. [2022-11-03 01:57:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10422 states, 7157 states have (on average 1.3667737878999582) internal successors, (9782), 7331 states have internal predecessors, (9782), 2322 states have call successors, (2322), 943 states have call predecessors, (2322), 942 states have return successors, (2559), 2267 states have call predecessors, (2559), 2321 states have call successors, (2559) [2022-11-03 01:57:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10422 states to 10422 states and 14663 transitions. [2022-11-03 01:57:01,131 INFO L78 Accepts]: Start accepts. Automaton has 10422 states and 14663 transitions. Word has length 101 [2022-11-03 01:57:01,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:01,133 INFO L495 AbstractCegarLoop]: Abstraction has 10422 states and 14663 transitions. [2022-11-03 01:57:01,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:57:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 10422 states and 14663 transitions. [2022-11-03 01:57:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 01:57:01,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:01,150 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:01,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:01,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:01,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:01,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1058301684, now seen corresponding path program 1 times [2022-11-03 01:57:01,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:01,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954890125] [2022-11-03 01:57:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:01,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:01,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834348571] [2022-11-03 01:57:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:01,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:01,422 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:01,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:57:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:01,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:57:01,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:57:01,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:01,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:01,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954890125] [2022-11-03 01:57:01,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:01,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834348571] [2022-11-03 01:57:01,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834348571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:01,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:01,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895006736] [2022-11-03 01:57:01,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:01,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:01,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:01,986 INFO L87 Difference]: Start difference. First operand 10422 states and 14663 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 01:57:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:03,501 INFO L93 Difference]: Finished difference Result 30836 states and 43263 transitions. [2022-11-03 01:57:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:03,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 106 [2022-11-03 01:57:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:03,740 INFO L225 Difference]: With dead ends: 30836 [2022-11-03 01:57:03,740 INFO L226 Difference]: Without dead ends: 20433 [2022-11-03 01:57:03,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:03,775 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 724 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:03,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1406 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20433 states. [2022-11-03 01:57:04,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20433 to 16183. [2022-11-03 01:57:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16183 states, 11063 states have (on average 1.3618367531411009) internal successors, (15066), 11350 states have internal predecessors, (15066), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1508 states have return successors, (3956), 3523 states have call predecessors, (3956), 3610 states have call successors, (3956) [2022-11-03 01:57:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16183 states to 16183 states and 22633 transitions. [2022-11-03 01:57:04,618 INFO L78 Accepts]: Start accepts. Automaton has 16183 states and 22633 transitions. Word has length 106 [2022-11-03 01:57:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:04,618 INFO L495 AbstractCegarLoop]: Abstraction has 16183 states and 22633 transitions. [2022-11-03 01:57:04,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 01:57:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 16183 states and 22633 transitions. [2022-11-03 01:57:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 01:57:04,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:04,630 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:04,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 01:57:04,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:04,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:04,854 INFO L85 PathProgramCache]: Analyzing trace with hash -795848126, now seen corresponding path program 1 times [2022-11-03 01:57:04,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:04,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691988134] [2022-11-03 01:57:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:04,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:04,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:04,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015752566] [2022-11-03 01:57:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:04,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:04,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:04,905 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:04,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:57:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:05,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:05,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 01:57:05,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:05,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:05,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691988134] [2022-11-03 01:57:05,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:05,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015752566] [2022-11-03 01:57:05,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015752566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:05,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:05,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274816867] [2022-11-03 01:57:05,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:05,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:05,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:05,370 INFO L87 Difference]: Start difference. First operand 16183 states and 22633 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:57:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:06,319 INFO L93 Difference]: Finished difference Result 24481 states and 34660 transitions. [2022-11-03 01:57:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 106 [2022-11-03 01:57:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:06,390 INFO L225 Difference]: With dead ends: 24481 [2022-11-03 01:57:06,390 INFO L226 Difference]: Without dead ends: 16271 [2022-11-03 01:57:06,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:06,420 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 4 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:06,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1356 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:06,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16271 states. [2022-11-03 01:57:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16271 to 16271. [2022-11-03 01:57:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16271 states, 11129 states have (on average 1.359690897654776) internal successors, (15132), 11438 states have internal predecessors, (15132), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1530 states have return successors, (3998), 3523 states have call predecessors, (3998), 3610 states have call successors, (3998) [2022-11-03 01:57:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16271 states to 16271 states and 22741 transitions. [2022-11-03 01:57:07,425 INFO L78 Accepts]: Start accepts. Automaton has 16271 states and 22741 transitions. Word has length 106 [2022-11-03 01:57:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:07,427 INFO L495 AbstractCegarLoop]: Abstraction has 16271 states and 22741 transitions. [2022-11-03 01:57:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 01:57:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 16271 states and 22741 transitions. [2022-11-03 01:57:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 01:57:07,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:07,445 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:07,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:57:07,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:07,671 INFO L85 PathProgramCache]: Analyzing trace with hash 539948710, now seen corresponding path program 1 times [2022-11-03 01:57:07,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:07,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497067224] [2022-11-03 01:57:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:07,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:07,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:07,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772946676] [2022-11-03 01:57:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:07,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:07,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:07,744 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:07,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:57:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 01:57:08,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:08,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497067224] [2022-11-03 01:57:08,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772946676] [2022-11-03 01:57:08,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772946676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:08,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:08,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:08,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843480631] [2022-11-03 01:57:08,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:08,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:08,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:08,407 INFO L87 Difference]: Start difference. First operand 16271 states and 22741 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 01:57:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:12,079 INFO L93 Difference]: Finished difference Result 33305 states and 46934 transitions. [2022-11-03 01:57:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:57:12,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 107 [2022-11-03 01:57:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:12,164 INFO L225 Difference]: With dead ends: 33305 [2022-11-03 01:57:12,164 INFO L226 Difference]: Without dead ends: 17053 [2022-11-03 01:57:12,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:12,218 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 842 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 2724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:12,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [952 Valid, 2103 Invalid, 2724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 01:57:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17053 states. [2022-11-03 01:57:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17053 to 16603. [2022-11-03 01:57:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16603 states, 11315 states have (on average 1.3507733097657977) internal successors, (15284), 11622 states have internal predecessors, (15284), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-03 01:57:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16603 states to 16603 states and 22937 transitions. [2022-11-03 01:57:13,189 INFO L78 Accepts]: Start accepts. Automaton has 16603 states and 22937 transitions. Word has length 107 [2022-11-03 01:57:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:13,190 INFO L495 AbstractCegarLoop]: Abstraction has 16603 states and 22937 transitions. [2022-11-03 01:57:13,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 01:57:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 16603 states and 22937 transitions. [2022-11-03 01:57:13,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:57:13,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:13,203 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:13,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:13,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 01:57:13,430 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:13,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1213070829, now seen corresponding path program 1 times [2022-11-03 01:57:13,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:13,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706107581] [2022-11-03 01:57:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:13,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:13,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:13,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084020714] [2022-11-03 01:57:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:13,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:13,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:13,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:57:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:57:13,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 01:57:14,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:14,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:14,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706107581] [2022-11-03 01:57:14,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:14,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084020714] [2022-11-03 01:57:14,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084020714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:14,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:14,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:14,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698610465] [2022-11-03 01:57:14,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:14,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:14,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:14,200 INFO L87 Difference]: Start difference. First operand 16603 states and 22937 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:57:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:15,664 INFO L93 Difference]: Finished difference Result 16753 states and 23152 transitions. [2022-11-03 01:57:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 113 [2022-11-03 01:57:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:15,728 INFO L225 Difference]: With dead ends: 16753 [2022-11-03 01:57:15,729 INFO L226 Difference]: Without dead ends: 16717 [2022-11-03 01:57:15,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:15,738 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 715 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:15,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 1060 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:57:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16717 states. [2022-11-03 01:57:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16717 to 16615. [2022-11-03 01:57:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16615 states, 11327 states have (on average 1.3504016950648892) internal successors, (15296), 11634 states have internal predecessors, (15296), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-03 01:57:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16615 states to 16615 states and 22949 transitions. [2022-11-03 01:57:16,717 INFO L78 Accepts]: Start accepts. Automaton has 16615 states and 22949 transitions. Word has length 113 [2022-11-03 01:57:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:16,718 INFO L495 AbstractCegarLoop]: Abstraction has 16615 states and 22949 transitions. [2022-11-03 01:57:16,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-03 01:57:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 16615 states and 22949 transitions. [2022-11-03 01:57:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 01:57:16,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:16,747 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:16,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:16,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:16,962 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1234055063, now seen corresponding path program 1 times [2022-11-03 01:57:16,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:16,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2822613] [2022-11-03 01:57:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:17,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:17,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644104809] [2022-11-03 01:57:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:17,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:17,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:17,029 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:17,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:57:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:57:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 01:57:17,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:17,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:17,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2822613] [2022-11-03 01:57:17,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644104809] [2022-11-03 01:57:17,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644104809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:17,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:17,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:57:17,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443312867] [2022-11-03 01:57:17,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:17,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:57:17,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:57:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:17,640 INFO L87 Difference]: Start difference. First operand 16615 states and 22949 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:57:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:18,513 INFO L93 Difference]: Finished difference Result 24975 states and 34511 transitions. [2022-11-03 01:57:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:57:18,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 116 [2022-11-03 01:57:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:18,557 INFO L225 Difference]: With dead ends: 24975 [2022-11-03 01:57:18,557 INFO L226 Difference]: Without dead ends: 8071 [2022-11-03 01:57:18,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:57:18,608 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 694 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:18,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 921 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:57:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2022-11-03 01:57:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 8071. [2022-11-03 01:57:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8071 states, 5486 states have (on average 1.344331024425811) internal successors, (7375), 5642 states have internal predecessors, (7375), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2022-11-03 01:57:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8071 states to 8071 states and 11118 transitions. [2022-11-03 01:57:19,250 INFO L78 Accepts]: Start accepts. Automaton has 8071 states and 11118 transitions. Word has length 116 [2022-11-03 01:57:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:19,251 INFO L495 AbstractCegarLoop]: Abstraction has 8071 states and 11118 transitions. [2022-11-03 01:57:19,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:57:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 8071 states and 11118 transitions. [2022-11-03 01:57:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 01:57:19,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:19,262 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:19,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:19,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:57:19,478 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1081113176, now seen corresponding path program 1 times [2022-11-03 01:57:19,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:19,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281364486] [2022-11-03 01:57:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:19,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:19,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:57:19,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202022694] [2022-11-03 01:57:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:19,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:19,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:19,518 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:19,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:57:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:19,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:19,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 01:57:20,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-03 01:57:20,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:20,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281364486] [2022-11-03 01:57:20,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:57:20,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202022694] [2022-11-03 01:57:20,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202022694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:20,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862601372] [2022-11-03 01:57:20,391 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-03 01:57:20,391 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:20,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:57:20,401 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:57:20,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:57:21,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-03 01:57:21,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-03 01:57:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:22,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:22,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-03 01:57:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:57:23,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-03 01:57:40,761 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 82 for LOIs [2022-11-03 01:57:40,787 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:57:59,161 WARN L234 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 638 DAG size of output: 636 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:06,006 WARN L234 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 650 DAG size of output: 648 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:13,395 WARN L234 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 661 DAG size of output: 652 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:21,064 WARN L234 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 671 DAG size of output: 662 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:29,054 WARN L234 SmtUtils]: Spent 7.71s on a formula simplification. DAG size of input: 679 DAG size of output: 666 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:38,129 WARN L234 SmtUtils]: Spent 8.76s on a formula simplification. DAG size of input: 713 DAG size of output: 700 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:47,497 WARN L234 SmtUtils]: Spent 9.03s on a formula simplification. DAG size of input: 736 DAG size of output: 705 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:58:57,804 WARN L234 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 748 DAG size of output: 717 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:08,567 WARN L234 SmtUtils]: Spent 10.46s on a formula simplification. DAG size of input: 759 DAG size of output: 728 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:19,484 WARN L234 SmtUtils]: Spent 10.58s on a formula simplification. DAG size of input: 761 DAG size of output: 730 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:30,394 WARN L234 SmtUtils]: Spent 10.52s on a formula simplification. DAG size of input: 751 DAG size of output: 720 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:42,174 WARN L234 SmtUtils]: Spent 11.30s on a formula simplification. DAG size of input: 762 DAG size of output: 731 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:59:53,590 WARN L234 SmtUtils]: Spent 10.99s on a formula simplification. DAG size of input: 764 DAG size of output: 733 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:04,774 WARN L234 SmtUtils]: Spent 10.72s on a formula simplification. DAG size of input: 754 DAG size of output: 723 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:17,238 WARN L234 SmtUtils]: Spent 11.96s on a formula simplification. DAG size of input: 777 DAG size of output: 746 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:29,977 WARN L234 SmtUtils]: Spent 12.21s on a formula simplification. DAG size of input: 764 DAG size of output: 733 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:42,289 WARN L234 SmtUtils]: Spent 11.79s on a formula simplification. DAG size of input: 752 DAG size of output: 721 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:55,308 WARN L234 SmtUtils]: Spent 12.38s on a formula simplification. DAG size of input: 754 DAG size of output: 723 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:00:55,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1862601372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:00:55,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:00:55,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [4, 5] total 32 [2022-11-03 02:00:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041383556] [2022-11-03 02:00:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:00:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:00:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:00:55,317 INFO L87 Difference]: Start difference. First operand 8071 states and 11118 transitions. Second operand has 26 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-03 02:01:05,754 WARN L234 SmtUtils]: Spent 10.11s on a formula simplification. DAG size of input: 801 DAG size of output: 800 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:01:16,172 WARN L234 SmtUtils]: Spent 10.21s on a formula simplification. DAG size of input: 809 DAG size of output: 808 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:01:26,964 WARN L234 SmtUtils]: Spent 10.48s on a formula simplification. DAG size of input: 815 DAG size of output: 814 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:01:32,395 WARN L234 SmtUtils]: Spent 5.10s on a formula simplification that was a NOOP. DAG size: 800 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:01:38,145 WARN L234 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 810 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:01:44,198 WARN L234 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 816 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:01:50,373 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 828 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:01:56,979 WARN L234 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 832 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:02:03,425 WARN L234 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 842 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:02:10,440 WARN L234 SmtUtils]: Spent 6.30s on a formula simplification that was a NOOP. DAG size: 846 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:02:17,909 WARN L234 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 880 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:02:25,875 WARN L234 SmtUtils]: Spent 7.16s on a formula simplification that was a NOOP. DAG size: 885 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:02:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:49,186 INFO L93 Difference]: Finished difference Result 16175 states and 22299 transitions. [2022-11-03 02:02:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:02:49,189 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 119 [2022-11-03 02:02:49,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:49,221 INFO L225 Difference]: With dead ends: 16175 [2022-11-03 02:02:49,222 INFO L226 Difference]: Without dead ends: 8123 [2022-11-03 02:02:49,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 282.2s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:02:49,243 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 71 mSDsluCounter, 4515 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 4753 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:49,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 4753 Invalid, 2620 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [93 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 25.7s Time] [2022-11-03 02:02:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2022-11-03 02:02:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 8100. [2022-11-03 02:02:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8100 states, 5510 states have (on average 1.3439201451905627) internal successors, (7405), 5666 states have internal predecessors, (7405), 1816 states have call successors, (1816), 737 states have call predecessors, (1816), 773 states have return successors, (1944), 1793 states have call predecessors, (1944), 1815 states have call successors, (1944) [2022-11-03 02:02:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8100 states to 8100 states and 11165 transitions. [2022-11-03 02:02:49,846 INFO L78 Accepts]: Start accepts. Automaton has 8100 states and 11165 transitions. Word has length 119 [2022-11-03 02:02:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:49,846 INFO L495 AbstractCegarLoop]: Abstraction has 8100 states and 11165 transitions. [2022-11-03 02:02:49,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-03 02:02:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8100 states and 11165 transitions. [2022-11-03 02:02:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:02:49,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:49,857 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 2, 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, 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, 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, 1, 1] [2022-11-03 02:02:49,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:50,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:02:50,074 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:50,075 INFO L85 PathProgramCache]: Analyzing trace with hash 216298255, now seen corresponding path program 1 times [2022-11-03 02:02:50,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:50,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939191674] [2022-11-03 02:02:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:50,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:50,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:02:50,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522516629] [2022-11-03 02:02:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:50,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:50,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:50,149 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:50,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:02:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:50,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:02:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 02:02:50,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-03 02:02:51,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:02:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939191674] [2022-11-03 02:02:51,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:02:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522516629] [2022-11-03 02:02:51,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522516629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078739414] [2022-11-03 02:02:51,021 INFO L159 IcfgInterpreter]: Started Sifa with 85 locations of interest [2022-11-03 02:02:51,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:51,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:51,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:51,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:51,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-03 02:02:51,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-03 02:02:52,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:02:52,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:02:52,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:02:52,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:52,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:52,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-03 02:02:53,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:53,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-03 02:02:58,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 02:02:58,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:02:58,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 02:03:02,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 02:03:02,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 02:03:02,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:03:11,426 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 154 for LOIs [2022-11-03 02:03:11,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:03:11,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:03:11,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 02:03:12,578 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 177 for LOIs [2022-11-03 02:03:12,762 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:18,863 WARN L234 SmtUtils]: Spent 5.91s on a formula simplification that was a NOOP. DAG size: 796 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:03:47,012 WARN L234 SmtUtils]: Spent 24.96s on a formula simplification. DAG size of input: 713 DAG size of output: 673 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:04:09,070 WARN L234 SmtUtils]: Spent 21.47s on a formula simplification. DAG size of input: 723 DAG size of output: 651 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:04:39,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2078739414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:39,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:04:39,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 5] total 36 [2022-11-03 02:04:39,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281789021] [2022-11-03 02:04:39,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:39,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:04:39,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:39,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:04:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:04:39,635 INFO L87 Difference]: Start difference. First operand 8100 states and 11165 transitions. Second operand has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-03 02:04:55,332 WARN L234 SmtUtils]: Spent 15.08s on a formula simplification. DAG size of input: 863 DAG size of output: 811 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:05:11,021 WARN L234 SmtUtils]: Spent 15.10s on a formula simplification. DAG size of input: 871 DAG size of output: 819 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:05:28,151 WARN L234 SmtUtils]: Spent 16.54s on a formula simplification. DAG size of input: 897 DAG size of output: 843 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:05:45,105 WARN L234 SmtUtils]: Spent 16.41s on a formula simplification. DAG size of input: 876 DAG size of output: 822 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:06:00,299 WARN L234 SmtUtils]: Spent 14.68s on a formula simplification. DAG size of input: 826 DAG size of output: 821 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:06:32,121 WARN L234 SmtUtils]: Spent 31.30s on a formula simplification. DAG size of input: 881 DAG size of output: 830 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:04,333 WARN L234 SmtUtils]: Spent 31.64s on a formula simplification. DAG size of input: 828 DAG size of output: 828 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:24,232 WARN L234 SmtUtils]: Spent 16.61s on a formula simplification. DAG size of input: 840 DAG size of output: 812 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:40,884 WARN L234 SmtUtils]: Spent 16.09s on a formula simplification. DAG size of input: 823 DAG size of output: 819 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:58,980 WARN L234 SmtUtils]: Spent 16.04s on a formula simplification. DAG size of input: 830 DAG size of output: 821 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:16,397 WARN L234 SmtUtils]: Spent 16.87s on a formula simplification. DAG size of input: 841 DAG size of output: 832 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:35,906 WARN L234 SmtUtils]: Spent 17.31s on a formula simplification. DAG size of input: 845 DAG size of output: 834 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:54,934 WARN L234 SmtUtils]: Spent 18.41s on a formula simplification. DAG size of input: 880 DAG size of output: 869 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:09:25,232 WARN L234 SmtUtils]: Spent 21.58s on a formula simplification. DAG size of input: 929 DAG size of output: 896 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:09:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:41,245 INFO L93 Difference]: Finished difference Result 16185 states and 22304 transitions. [2022-11-03 02:09:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 02:09:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 125 [2022-11-03 02:09:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:41,276 INFO L225 Difference]: With dead ends: 16185 [2022-11-03 02:09:41,276 INFO L226 Difference]: Without dead ends: 8133 [2022-11-03 02:09:41,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 362.5s TimeCoverageRelationStatistics Valid=348, Invalid=2844, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:09:41,296 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 43 mSDsluCounter, 10366 mSDsCounter, 0 mSdLazyCounter, 4665 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 10047 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:41,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 10047 Invalid, 5009 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 4665 Invalid, 0 Unknown, 298 Unchecked, 25.2s Time] [2022-11-03 02:09:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8133 states. [2022-11-03 02:09:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8133 to 8103. [2022-11-03 02:09:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8103 states, 5512 states have (on average 1.3439767779390421) internal successors, (7408), 5669 states have internal predecessors, (7408), 1816 states have call successors, (1816), 738 states have call predecessors, (1816), 774 states have return successors, (1944), 1792 states have call predecessors, (1944), 1815 states have call successors, (1944) [2022-11-03 02:09:41,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8103 states to 8103 states and 11168 transitions. [2022-11-03 02:09:41,884 INFO L78 Accepts]: Start accepts. Automaton has 8103 states and 11168 transitions. Word has length 125 [2022-11-03 02:09:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:41,884 INFO L495 AbstractCegarLoop]: Abstraction has 8103 states and 11168 transitions. [2022-11-03 02:09:41,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-03 02:09:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 8103 states and 11168 transitions. [2022-11-03 02:09:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:09:41,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:41,896 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 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, 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, 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, 1, 1, 1, 1, 1] [2022-11-03 02:09:41,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:42,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:09:42,122 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash 478321176, now seen corresponding path program 1 times [2022-11-03 02:09:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:42,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050617145] [2022-11-03 02:09:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:42,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:09:42,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55592778] [2022-11-03 02:09:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:42,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:42,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:42,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:42,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca7fbaa0-cc42-4410-8fd7-38f070dbaac9/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:09:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:09:42,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-03 02:09:42,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-03 02:09:43,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:43,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050617145] [2022-11-03 02:09:43,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:09:43,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55592778] [2022-11-03 02:09:43,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55592778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:43,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959335754] [2022-11-03 02:09:43,047 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-11-03 02:09:43,048 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:09:43,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:09:43,049 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:09:43,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:09:43,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-03 02:09:43,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 760 treesize of output 606 [2022-11-03 02:09:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:44,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-03 02:09:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:45,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:45,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:45,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34