./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh --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 32bit --witnessprinter.graph.data.programhash 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- 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-2329fc7 [2022-12-14 05:05:28,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:05:28,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:05:28,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:05:28,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:05:28,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:05:28,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:05:28,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:05:28,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:05:28,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:05:28,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:05:28,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:05:28,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:05:28,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:05:28,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:05:28,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:05:28,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:05:28,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:05:28,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:05:28,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:05:28,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:05:28,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:05:28,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:05:28,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:05:28,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:05:28,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:05:28,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:05:28,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:05:28,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:05:28,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:05:28,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:05:28,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:05:28,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:05:28,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:05:28,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:05:28,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:05:28,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:05:28,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:05:28,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:05:28,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:05:28,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:05:28,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:05:28,682 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:05:28,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:05:28,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:05:28,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:05:28,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:05:28,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:05:28,688 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:05:28,688 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:05:28,689 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:05:28,689 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:05:28,689 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:05:28,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:05:28,689 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:05:28,690 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:05:28,690 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:05:28,690 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:05:28,690 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:05:28,690 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:05:28,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:05:28,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:05:28,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:05:28,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:05:28,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:05:28,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:05:28,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:05:28,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:05:28,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:05:28,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:05:28,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:05:28,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:05:28,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:05:28,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:05:28,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:05:28,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:05:28,694 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:05:28,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:05:28,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:05:28,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:05:28,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:05:28,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:05:28,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:05:28,695 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_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2022-12-14 05:05:28,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:05:28,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:05:28,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:05:28,884 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:05:28,885 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:05:28,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-12-14 05:05:31,467 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:05:31,715 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:05:31,716 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-12-14 05:05:31,730 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/data/10ee08cd8/2d1c9aac0a324954a6164663055915c0/FLAGded097dcb [2022-12-14 05:05:31,741 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/data/10ee08cd8/2d1c9aac0a324954a6164663055915c0 [2022-12-14 05:05:31,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:05:31,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:05:31,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:05:31,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:05:31,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:05:31,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:05:31" (1/1) ... [2022-12-14 05:05:31,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3496c530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:31, skipping insertion in model container [2022-12-14 05:05:31,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:05:31" (1/1) ... [2022-12-14 05:05:31,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:05:31,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:05:32,147 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-12-14 05:05:32,264 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 05:05:32,280 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 05:05:32,296 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 05:05:32,311 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 05:05:32,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:05:32,335 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:05:32,355 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-12-14 05:05:32,416 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 05:05:32,424 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 05:05:32,431 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 05:05:32,439 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 05:05:32,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:05:32,474 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:05:32,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32 WrapperNode [2022-12-14 05:05:32,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:05:32,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:05:32,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:05:32,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:05:32,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,558 INFO L138 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2459 [2022-12-14 05:05:32,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:05:32,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:05:32,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:05:32,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:05:32,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,628 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:05:32,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:05:32,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:05:32,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:05:32,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (1/1) ... [2022-12-14 05:05:32,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:05:32,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:32,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:05:32,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:05:32,710 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-12-14 05:05:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 05:05:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-14 05:05:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 05:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:05:32,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:05:32,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:05:32,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:05:32,941 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:05:32,943 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:05:34,787 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:05:35,349 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:05:35,350 INFO L300 CfgBuilder]: Removed 168 assume(true) statements. [2022-12-14 05:05:35,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:05:35 BoogieIcfgContainer [2022-12-14 05:05:35,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:05:35,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:05:35,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:05:35,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:05:35,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:05:31" (1/3) ... [2022-12-14 05:05:35,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c320559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:05:35, skipping insertion in model container [2022-12-14 05:05:35,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:05:32" (2/3) ... [2022-12-14 05:05:35,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c320559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:05:35, skipping insertion in model container [2022-12-14 05:05:35,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:05:35" (3/3) ... [2022-12-14 05:05:35,359 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-3.i [2022-12-14 05:05:35,374 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:05:35,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:05:35,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:05:35,421 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;@2c98b064, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:05:35,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:05:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 258 states have (on average 1.8255813953488371) internal successors, (471), 263 states have internal predecessors, (471), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 05:05:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:05:35,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:35,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:35,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:05:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:35,437 INFO L85 PathProgramCache]: Analyzing trace with hash 503629004, now seen corresponding path program 1 times [2022-12-14 05:05:35,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:05:35,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736094303] [2022-12-14 05:05:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:35,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:05:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:35,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:05:35,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736094303] [2022-12-14 05:05:35,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736094303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:35,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:35,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:05:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690177580] [2022-12-14 05:05:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:35,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 05:05:35,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:05:35,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 05:05:35,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 05:05:35,617 INFO L87 Difference]: Start difference. First operand has 277 states, 258 states have (on average 1.8255813953488371) internal successors, (471), 263 states have internal predecessors, (471), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:37,005 INFO L93 Difference]: Finished difference Result 553 states and 1005 transitions. [2022-12-14 05:05:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 05:05:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 05:05:37,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:37,016 INFO L225 Difference]: With dead ends: 553 [2022-12-14 05:05:37,016 INFO L226 Difference]: Without dead ends: 249 [2022-12-14 05:05:37,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 05:05:37,021 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:37,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 300 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 05:05:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-12-14 05:05:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-12-14 05:05:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 231 states have (on average 1.199134199134199) internal successors, (277), 236 states have internal predecessors, (277), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 05:05:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 304 transitions. [2022-12-14 05:05:37,067 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 304 transitions. Word has length 12 [2022-12-14 05:05:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:37,067 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 304 transitions. [2022-12-14 05:05:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 304 transitions. [2022-12-14 05:05:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 05:05:37,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:37,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:37,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:05:37,070 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:05:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:37,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1964521249, now seen corresponding path program 1 times [2022-12-14 05:05:37,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:05:37,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110148192] [2022-12-14 05:05:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:05:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:37,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:05:37,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110148192] [2022-12-14 05:05:37,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110148192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:37,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:37,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:05:37,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277390593] [2022-12-14 05:05:37,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:37,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:05:37,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:05:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:05:37,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:05:37,334 INFO L87 Difference]: Start difference. First operand 249 states and 304 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:39,985 INFO L93 Difference]: Finished difference Result 425 states and 521 transitions. [2022-12-14 05:05:39,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:05:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 05:05:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:39,987 INFO L225 Difference]: With dead ends: 425 [2022-12-14 05:05:39,987 INFO L226 Difference]: Without dead ends: 276 [2022-12-14 05:05:39,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:05:39,988 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 27 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:39,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 766 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 05:05:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-12-14 05:05:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2022-12-14 05:05:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 233 states have (on average 1.1974248927038627) internal successors, (279), 238 states have internal predecessors, (279), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-14 05:05:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 306 transitions. [2022-12-14 05:05:39,999 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 306 transitions. Word has length 24 [2022-12-14 05:05:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:39,999 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 306 transitions. [2022-12-14 05:05:39,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 306 transitions. [2022-12-14 05:05:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 05:05:40,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:40,001 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:05:40,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:05:40,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:05:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:40,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1257420265, now seen corresponding path program 1 times [2022-12-14 05:05:40,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:05:40,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945133266] [2022-12-14 05:05:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:40,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:05:40,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:05:40,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678890080] [2022-12-14 05:05:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:40,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:40,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:40,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:40,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:05:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:05:40,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:40,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:40,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:05:40,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945133266] [2022-12-14 05:05:40,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:05:40,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678890080] [2022-12-14 05:05:40,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678890080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:40,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:40,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:05:40,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319814883] [2022-12-14 05:05:40,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:40,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:05:40,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:05:40,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:05:40,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:05:40,784 INFO L87 Difference]: Start difference. First operand 251 states and 306 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:43,088 INFO L93 Difference]: Finished difference Result 614 states and 746 transitions. [2022-12-14 05:05:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:05:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 05:05:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:43,090 INFO L225 Difference]: With dead ends: 614 [2022-12-14 05:05:43,090 INFO L226 Difference]: Without dead ends: 366 [2022-12-14 05:05:43,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:05:43,092 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 120 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:43,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 571 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 05:05:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-12-14 05:05:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2022-12-14 05:05:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 339 states have (on average 1.1799410029498525) internal successors, (400), 344 states have internal predecessors, (400), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 05:05:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 437 transitions. [2022-12-14 05:05:43,105 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 437 transitions. Word has length 49 [2022-12-14 05:05:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:43,105 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 437 transitions. [2022-12-14 05:05:43,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 437 transitions. [2022-12-14 05:05:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 05:05:43,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:43,107 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:05:43,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:43,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:43,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:05:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2113811746, now seen corresponding path program 1 times [2022-12-14 05:05:43,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:05:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909202333] [2022-12-14 05:05:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:05:43,375 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:05:43,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262130198] [2022-12-14 05:05:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:43,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:43,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:43,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:43,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:05:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:05:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:43,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 05:05:43,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 05:05:43,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:05:43,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 05:05:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:05:43,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:43,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:05:43,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909202333] [2022-12-14 05:05:43,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:05:43,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262130198] [2022-12-14 05:05:43,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262130198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:43,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:43,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:05:43,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872236816] [2022-12-14 05:05:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:43,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:05:43,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:05:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:05:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:05:43,917 INFO L87 Difference]: Start difference. First operand 362 states and 437 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 05:05:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:46,364 INFO L93 Difference]: Finished difference Result 674 states and 815 transitions. [2022-12-14 05:05:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:05:46,365 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2022-12-14 05:05:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:46,366 INFO L225 Difference]: With dead ends: 674 [2022-12-14 05:05:46,366 INFO L226 Difference]: Without dead ends: 362 [2022-12-14 05:05:46,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:05:46,367 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 13 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:46,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 766 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 05:05:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-12-14 05:05:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-12-14 05:05:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 339 states have (on average 1.176991150442478) internal successors, (399), 344 states have internal predecessors, (399), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 05:05:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 436 transitions. [2022-12-14 05:05:46,379 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 436 transitions. Word has length 62 [2022-12-14 05:05:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:46,379 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 436 transitions. [2022-12-14 05:05:46,379 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 05:05:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 436 transitions. [2022-12-14 05:05:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 05:05:46,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:46,380 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:46,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:05:46,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:46,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:05:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash -950373442, now seen corresponding path program 1 times [2022-12-14 05:05:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:05:46,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726535508] [2022-12-14 05:05:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:05:46,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:05:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536272375] [2022-12-14 05:05:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:46,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:46,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:46,745 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:46,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:05:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:47,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 2300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:05:47,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:05:47,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:47,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:05:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726535508] [2022-12-14 05:05:47,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:05:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536272375] [2022-12-14 05:05:47,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536272375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:47,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:47,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:05:47,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436175565] [2022-12-14 05:05:47,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:47,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:05:47,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:05:47,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:05:47,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:05:47,570 INFO L87 Difference]: Start difference. First operand 362 states and 436 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 05:05:48,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 05:05:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:49,903 INFO L93 Difference]: Finished difference Result 820 states and 988 transitions. [2022-12-14 05:05:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:05:49,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2022-12-14 05:05:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:49,907 INFO L225 Difference]: With dead ends: 820 [2022-12-14 05:05:49,907 INFO L226 Difference]: Without dead ends: 484 [2022-12-14 05:05:49,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:05:49,908 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 110 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:49,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 531 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 05:05:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-12-14 05:05:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 429. [2022-12-14 05:05:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 403 states have (on average 1.1687344913151365) internal successors, (471), 408 states have internal predecessors, (471), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 05:05:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 514 transitions. [2022-12-14 05:05:49,922 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 514 transitions. Word has length 83 [2022-12-14 05:05:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:49,922 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 514 transitions. [2022-12-14 05:05:49,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 05:05:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 514 transitions. [2022-12-14 05:05:49,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 05:05:49,924 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:49,924 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-12-14 05:05:49,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:50,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:50,125 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:05:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -27574933, now seen corresponding path program 1 times [2022-12-14 05:05:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:05:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707658344] [2022-12-14 05:05:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:50,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:05:50,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:05:50,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234962455] [2022-12-14 05:05:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:50,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:50,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:50,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:50,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:05:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:05:50,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:05:50,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:50,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:05:50,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707658344] [2022-12-14 05:05:50,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:05:50,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234962455] [2022-12-14 05:05:50,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234962455] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:50,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:50,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:05:50,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431775352] [2022-12-14 05:05:50,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:50,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:05:50,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:05:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:05:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:05:50,867 INFO L87 Difference]: Start difference. First operand 429 states and 514 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 05:05:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:52,113 INFO L93 Difference]: Finished difference Result 719 states and 867 transitions. [2022-12-14 05:05:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:05:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 96 [2022-12-14 05:05:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:52,115 INFO L225 Difference]: With dead ends: 719 [2022-12-14 05:05:52,115 INFO L226 Difference]: Without dead ends: 351 [2022-12-14 05:05:52,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:05:52,116 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 438 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:52,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 329 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 05:05:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-14 05:05:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-12-14 05:05:52,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 330 states have (on average 1.1666666666666667) internal successors, (385), 335 states have internal predecessors, (385), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 05:05:52,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 418 transitions. [2022-12-14 05:05:52,132 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 418 transitions. Word has length 96 [2022-12-14 05:05:52,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:52,133 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 418 transitions. [2022-12-14 05:05:52,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 05:05:52,133 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 418 transitions. [2022-12-14 05:05:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 05:05:52,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:52,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1] [2022-12-14 05:05:52,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:05:52,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 05:05:52,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:05:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash -951165356, now seen corresponding path program 1 times [2022-12-14 05:05:52,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:05:52,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627422467] [2022-12-14 05:05:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:05:52,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:05:52,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4410176] [2022-12-14 05:05:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:52,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:52,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:52,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:52,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:13:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:02,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:13:02,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 05:13:03,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:13:03,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:03,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627422467] [2022-12-14 05:13:03,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:13:03,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4410176] [2022-12-14 05:13:03,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4410176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:03,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:03,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:13:03,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892141905] [2022-12-14 05:13:03,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:03,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:13:03,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:13:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:13:03,009 INFO L87 Difference]: Start difference. First operand 351 states and 418 transitions. Second operand has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 05:13:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:05,230 INFO L93 Difference]: Finished difference Result 684 states and 823 transitions. [2022-12-14 05:13:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:13:05,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 103 [2022-12-14 05:13:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:05,232 INFO L225 Difference]: With dead ends: 684 [2022-12-14 05:13:05,232 INFO L226 Difference]: Without dead ends: 353 [2022-12-14 05:13:05,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:13:05,234 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:05,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 812 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 05:13:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-12-14 05:13:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-12-14 05:13:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 331 states have (on average 1.1691842900302114) internal successors, (387), 337 states have internal predecessors, (387), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-12-14 05:13:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 423 transitions. [2022-12-14 05:13:05,254 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 423 transitions. Word has length 103 [2022-12-14 05:13:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:05,254 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 423 transitions. [2022-12-14 05:13:05,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 05:13:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 423 transitions. [2022-12-14 05:13:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 05:13:05,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:05,256 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2022-12-14 05:13:05,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:13:05,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 05:13:05,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1701629228, now seen corresponding path program 1 times [2022-12-14 05:13:05,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:05,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154719687] [2022-12-14 05:13:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:05,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:05,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:13:05,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965425050] [2022-12-14 05:13:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:05,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:05,518 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:05,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_103bb07f-0d0d-41db-9325-93e207fdfa8e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process