./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:42:34,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:42:34,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:42:34,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:42:34,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:42:34,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:42:34,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:42:34,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:42:34,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:42:34,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:42:34,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:42:34,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:42:34,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:42:34,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:42:34,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:42:34,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:42:34,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:42:34,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:42:34,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:42:34,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:42:34,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:42:34,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:42:34,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:42:34,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:42:34,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:42:34,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:42:34,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:42:34,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:42:34,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:42:34,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:42:34,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:42:34,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:42:34,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:42:34,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:42:34,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:42:34,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:42:34,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:42:34,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:42:34,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:42:34,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:42:34,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:42:34,541 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:42:34,583 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:42:34,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:42:34,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:42:34,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:42:34,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:42:34,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:42:34,587 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:42:34,587 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:42:34,587 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:42:34,587 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:42:34,588 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:42:34,596 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:42:34,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:42:34,596 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:42:34,597 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:42:34,597 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:42:34,597 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:42:34,597 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:42:34,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:42:34,598 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:42:34,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:42:34,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:42:34,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:42:34,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:42:34,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:42:34,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:42:34,600 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:42:34,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:42:34,601 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:42:34,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:42:34,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:42:34,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:42:34,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:34,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:42:34,602 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:42:34,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:42:34,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:42:34,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:42:34,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:42:34,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:42:34,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:42:34,604 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_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2022-11-03 01:42:34,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:42:34,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:42:34,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:42:34,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:42:34,890 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:42:34,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2022-11-03 01:42:34,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/data/a20c2501e/b0d5a3a5b2e249868d2da2ad65df1df5/FLAG5c1ef14de [2022-11-03 01:42:35,364 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:42:35,371 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2022-11-03 01:42:35,377 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/data/a20c2501e/b0d5a3a5b2e249868d2da2ad65df1df5/FLAG5c1ef14de [2022-11-03 01:42:35,752 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/data/a20c2501e/b0d5a3a5b2e249868d2da2ad65df1df5 [2022-11-03 01:42:35,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:42:35,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:42:35,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:35,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:42:35,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:42:35,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:35" (1/1) ... [2022-11-03 01:42:35,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f601c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:35, skipping insertion in model container [2022-11-03 01:42:35,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:42:35" (1/1) ... [2022-11-03 01:42:35,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:42:35,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:42:35,975 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-11-03 01:42:36,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:36,010 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:42:36,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-11-03 01:42:36,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:42:36,068 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:42:36,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36 WrapperNode [2022-11-03 01:42:36,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:42:36,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:36,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:42:36,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:42:36,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,112 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-11-03 01:42:36,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:42:36,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:42:36,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:42:36,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:42:36,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:42:36,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:42:36,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:42:36,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:42:36,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (1/1) ... [2022-11-03 01:42:36,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:42:36,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:36,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:42:36,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:42:36,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:42:36,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:42:36,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:42:36,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:42:36,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 01:42:36,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 01:42:36,296 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:42:36,298 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:42:36,455 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:42:36,489 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:42:36,489 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:42:36,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:36 BoogieIcfgContainer [2022-11-03 01:42:36,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:42:36,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:42:36,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:42:36,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:42:36,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:42:35" (1/3) ... [2022-11-03 01:42:36,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d70b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:36, skipping insertion in model container [2022-11-03 01:42:36,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:42:36" (2/3) ... [2022-11-03 01:42:36,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d70b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:42:36, skipping insertion in model container [2022-11-03 01:42:36,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:36" (3/3) ... [2022-11-03 01:42:36,524 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2022-11-03 01:42:36,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:42:36,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:42:36,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:42:36,656 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;@55655bce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:42:36,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:42:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 01:42:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:42:36,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:36,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:36,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2022-11-03 01:42:36,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:36,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306323231] [2022-11-03 01:42:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:36,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:36,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:36,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306323231] [2022-11-03 01:42:36,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:42:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264104481] [2022-11-03 01:42:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:36,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:36,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:36,890 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:36,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:42:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:36,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 01:42:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:36,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:36,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264104481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:36,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:36,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:42:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243011426] [2022-11-03 01:42:36,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:37,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:42:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:42:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:42:37,057 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:37,112 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2022-11-03 01:42:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:42:37,115 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 01:42:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:37,135 INFO L225 Difference]: With dead ends: 43 [2022-11-03 01:42:37,135 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:42:37,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:42:37,141 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:37,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:42:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-03 01:42:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:42:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-11-03 01:42:37,194 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2022-11-03 01:42:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:37,194 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-11-03 01:42:37,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-11-03 01:42:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:42:37,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:37,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:37,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:37,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:37,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2022-11-03 01:42:37,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:37,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129135778] [2022-11-03 01:42:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:37,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:37,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:37,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129135778] [2022-11-03 01:42:37,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129135778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:37,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:37,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:42:37,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826341037] [2022-11-03 01:42:37,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:37,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:37,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:37,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:37,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:37,655 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:37,759 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2022-11-03 01:42:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:42:37,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 01:42:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:37,764 INFO L225 Difference]: With dead ends: 33 [2022-11-03 01:42:37,764 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 01:42:37,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:37,768 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:37,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 84 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 01:42:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-11-03 01:42:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:42:37,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-03 01:42:37,782 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2022-11-03 01:42:37,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:37,783 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-03 01:42:37,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-03 01:42:37,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:42:37,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:37,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:37,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:42:37,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:37,795 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2022-11-03 01:42:37,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424187353] [2022-11-03 01:42:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:37,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:37,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:37,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424187353] [2022-11-03 01:42:37,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 01:42:37,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509981257] [2022-11-03 01:42:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:37,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:37,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:37,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:37,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:42:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:42:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:37,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:37,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509981257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:37,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:37,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:42:37,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940757073] [2022-11-03 01:42:37,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:37,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:42:37,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:42:37,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:37,932 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:37,979 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-11-03 01:42:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:42:37,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:42:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:37,981 INFO L225 Difference]: With dead ends: 39 [2022-11-03 01:42:37,981 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 01:42:37,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:42:37,983 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:37,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 01:42:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-03 01:42:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:42:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-03 01:42:37,992 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2022-11-03 01:42:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:37,992 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-03 01:42:37,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-03 01:42:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:42:37,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:37,993 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:38,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:38,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:38,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:38,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2022-11-03 01:42:38,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:38,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54369795] [2022-11-03 01:42:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:38,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:38,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54369795] [2022-11-03 01:42:38,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54369795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:38,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:38,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:38,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078238658] [2022-11-03 01:42:38,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:38,371 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:38,439 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-03 01:42:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:42:38,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-03 01:42:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:38,440 INFO L225 Difference]: With dead ends: 39 [2022-11-03 01:42:38,440 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:42:38,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:38,442 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:38,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 84 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:38,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:42:38,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-03 01:42:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:42:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-03 01:42:38,450 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-11-03 01:42:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:38,451 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-03 01:42:38,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 01:42:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-03 01:42:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:42:38,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:38,454 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:38,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:42:38,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:38,456 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2022-11-03 01:42:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:38,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096431181] [2022-11-03 01:42:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:38,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:38,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:42:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687687203] [2022-11-03 01:42:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:38,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:38,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:38,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:42:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:42:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:42:38,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:38,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096431181] [2022-11-03 01:42:38,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:42:38,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687687203] [2022-11-03 01:42:38,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687687203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:38,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:38,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55376253] [2022-11-03 01:42:38,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:38,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:38,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:38,662 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:42:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:38,748 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-11-03 01:42:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-03 01:42:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:38,752 INFO L225 Difference]: With dead ends: 58 [2022-11-03 01:42:38,752 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 01:42:38,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:38,754 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:38,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 89 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:38,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 01:42:38,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-03 01:42:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:42:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2022-11-03 01:42:38,777 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 17 [2022-11-03 01:42:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:38,777 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2022-11-03 01:42:38,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:42:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2022-11-03 01:42:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:42:38,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:38,778 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:38,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:38,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:38,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2022-11-03 01:42:38,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:38,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942219494] [2022-11-03 01:42:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:38,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:38,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:42:38,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656350690] [2022-11-03 01:42:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:39,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:39,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:39,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:39,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:42:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:42:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:42:39,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:39,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:39,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942219494] [2022-11-03 01:42:39,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:42:39,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656350690] [2022-11-03 01:42:39,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656350690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:39,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:42:39,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:42:39,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582152686] [2022-11-03 01:42:39,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:39,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:39,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:42:39,128 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:42:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:39,191 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-11-03 01:42:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:39,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-11-03 01:42:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:39,193 INFO L225 Difference]: With dead ends: 57 [2022-11-03 01:42:39,193 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 01:42:39,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:39,194 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:39,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:42:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 01:42:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-03 01:42:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 01:42:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-03 01:42:39,214 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 25 [2022-11-03 01:42:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:39,214 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-03 01:42:39,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:42:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-03 01:42:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 01:42:39,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:39,216 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:39,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:39,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:42:39,437 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:39,438 INFO L85 PathProgramCache]: Analyzing trace with hash 292094342, now seen corresponding path program 1 times [2022-11-03 01:42:39,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:39,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570044121] [2022-11-03 01:42:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:39,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:39,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:42:39,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265162591] [2022-11-03 01:42:39,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:39,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:39,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:39,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:39,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:42:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:42:39,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:42:39,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:42:39,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:39,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570044121] [2022-11-03 01:42:39,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:42:39,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265162591] [2022-11-03 01:42:39,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265162591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:39,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871886512] [2022-11-03 01:42:39,690 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:42:39,690 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:39,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:39,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:39,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:42,254 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:42:42,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:43,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1094#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:43,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:43,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:42:43,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-03 01:42:43,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060782365] [2022-11-03 01:42:43,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:42:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:42:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:42:43,038 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:42:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:43,190 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2022-11-03 01:42:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:42:43,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 32 [2022-11-03 01:42:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:43,193 INFO L225 Difference]: With dead ends: 134 [2022-11-03 01:42:43,193 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 01:42:43,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:42:43,194 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 37 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:43,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 133 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 01:42:43,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2022-11-03 01:42:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 70 states have internal predecessors, (80), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 01:42:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2022-11-03 01:42:43,208 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 32 [2022-11-03 01:42:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:43,208 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2022-11-03 01:42:43,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-03 01:42:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2022-11-03 01:42:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 01:42:43,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:43,210 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 01:42:43,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:43,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:42:43,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:43,430 INFO L85 PathProgramCache]: Analyzing trace with hash 747162997, now seen corresponding path program 1 times [2022-11-03 01:42:43,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:43,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85133752] [2022-11-03 01:42:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:43,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:43,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:42:43,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796497692] [2022-11-03 01:42:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:43,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:43,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:43,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:42:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:43,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:42:43,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:42:43,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 01:42:43,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:43,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85133752] [2022-11-03 01:42:43,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:42:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796497692] [2022-11-03 01:42:43,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796497692] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:43,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:43,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-03 01:42:43,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477556867] [2022-11-03 01:42:43,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:43,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:42:43,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:42:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:42:43,688 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:42:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:43,756 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2022-11-03 01:42:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:42:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-11-03 01:42:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:43,758 INFO L225 Difference]: With dead ends: 116 [2022-11-03 01:42:43,758 INFO L226 Difference]: Without dead ends: 112 [2022-11-03 01:42:43,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:42:43,759 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:43,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:42:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-03 01:42:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-11-03 01:42:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 74 states have internal predecessors, (83), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 01:42:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2022-11-03 01:42:43,797 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 35 [2022-11-03 01:42:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:43,799 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2022-11-03 01:42:43,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 01:42:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2022-11-03 01:42:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 01:42:43,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:43,802 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:43,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:44,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:44,017 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2022-11-03 01:42:44,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:44,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762818640] [2022-11-03 01:42:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:44,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:44,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:42:44,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112125614] [2022-11-03 01:42:44,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:44,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:44,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:44,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:44,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:42:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:44,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:42:44,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 01:42:44,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 01:42:44,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:44,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762818640] [2022-11-03 01:42:44,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:42:44,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112125614] [2022-11-03 01:42:44,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112125614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:44,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [950367206] [2022-11-03 01:42:44,222 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:42:44,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:44,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:44,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:44,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:46,171 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:42:46,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:47,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2281#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:47,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:47,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:42:47,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-03 01:42:47,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049230379] [2022-11-03 01:42:47,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:42:47,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:42:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:42:47,029 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 01:42:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:47,232 INFO L93 Difference]: Finished difference Result 219 states and 255 transitions. [2022-11-03 01:42:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:42:47,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 48 [2022-11-03 01:42:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:47,235 INFO L225 Difference]: With dead ends: 219 [2022-11-03 01:42:47,235 INFO L226 Difference]: Without dead ends: 198 [2022-11-03 01:42:47,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:42:47,236 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 85 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:47,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 184 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:42:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-03 01:42:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2022-11-03 01:42:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1557377049180328) internal successors, (141), 128 states have internal predecessors, (141), 43 states have call successors, (43), 26 states have call predecessors, (43), 25 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-03 01:42:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 223 transitions. [2022-11-03 01:42:47,258 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 223 transitions. Word has length 48 [2022-11-03 01:42:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:47,259 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 223 transitions. [2022-11-03 01:42:47,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-03 01:42:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 223 transitions. [2022-11-03 01:42:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 01:42:47,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:47,260 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:47,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:47,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:47,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1127123487, now seen corresponding path program 1 times [2022-11-03 01:42:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:47,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916257453] [2022-11-03 01:42:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:47,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:42:47,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750286742] [2022-11-03 01:42:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:47,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:47,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:47,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:42:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:42:47,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 01:42:47,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 01:42:49,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:49,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916257453] [2022-11-03 01:42:49,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:42:49,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750286742] [2022-11-03 01:42:49,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750286742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:49,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895478598] [2022-11-03 01:42:49,691 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:42:49,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:49,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:49,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:49,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:42:53,247 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:42:53,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:42:54,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3229#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:42:54,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:42:54,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:42:54,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-11-03 01:42:54,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039932166] [2022-11-03 01:42:54,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:54,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:42:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:42:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:42:54,313 INFO L87 Difference]: Start difference. First operand 191 states and 223 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 01:42:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:56,123 INFO L93 Difference]: Finished difference Result 243 states and 278 transitions. [2022-11-03 01:42:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:42:56,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 56 [2022-11-03 01:42:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:56,126 INFO L225 Difference]: With dead ends: 243 [2022-11-03 01:42:56,126 INFO L226 Difference]: Without dead ends: 233 [2022-11-03 01:42:56,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:42:56,128 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 54 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:56,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 207 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:42:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-03 01:42:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 218. [2022-11-03 01:42:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 143 states have (on average 1.1258741258741258) internal successors, (161), 150 states have internal predecessors, (161), 42 states have call successors, (42), 32 states have call predecessors, (42), 32 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-03 01:42:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 242 transitions. [2022-11-03 01:42:56,182 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 242 transitions. Word has length 56 [2022-11-03 01:42:56,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:56,182 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 242 transitions. [2022-11-03 01:42:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-03 01:42:56,183 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 242 transitions. [2022-11-03 01:42:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 01:42:56,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:56,184 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:56,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:56,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:56,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash -638542057, now seen corresponding path program 2 times [2022-11-03 01:42:56,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:56,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149950095] [2022-11-03 01:42:56,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:56,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:56,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:42:56,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97668223] [2022-11-03 01:42:56,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:42:56,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:56,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:56,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:56,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:42:56,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:42:56,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:42:56,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 01:42:56,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 01:42:58,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:58,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149950095] [2022-11-03 01:42:58,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:42:58,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97668223] [2022-11-03 01:42:58,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97668223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:58,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890605262] [2022-11-03 01:42:58,398 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:42:58,399 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:42:58,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:42:58,399 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:42:58,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:00,637 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:43:00,648 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:01,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4276#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:01,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:01,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:01,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-03 01:43:01,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547785164] [2022-11-03 01:43:01,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:01,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:43:01,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:43:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:43:01,876 INFO L87 Difference]: Start difference. First operand 218 states and 242 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 01:43:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:06,043 INFO L93 Difference]: Finished difference Result 270 states and 306 transitions. [2022-11-03 01:43:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:43:06,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 61 [2022-11-03 01:43:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:06,046 INFO L225 Difference]: With dead ends: 270 [2022-11-03 01:43:06,046 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 01:43:06,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:43:06,048 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:06,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 164 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:43:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 01:43:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 232. [2022-11-03 01:43:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 153 states have (on average 1.1111111111111112) internal successors, (170), 160 states have internal predecessors, (170), 44 states have call successors, (44), 35 states have call predecessors, (44), 34 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 01:43:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 254 transitions. [2022-11-03 01:43:06,110 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 254 transitions. Word has length 61 [2022-11-03 01:43:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:06,111 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 254 transitions. [2022-11-03 01:43:06,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 01:43:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 254 transitions. [2022-11-03 01:43:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 01:43:06,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:06,115 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:06,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:06,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 01:43:06,329 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:06,329 INFO L85 PathProgramCache]: Analyzing trace with hash -143001442, now seen corresponding path program 1 times [2022-11-03 01:43:06,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:06,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840817179] [2022-11-03 01:43:06,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:06,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:06,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:43:06,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534285339] [2022-11-03 01:43:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:06,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:06,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:06,345 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:06,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:43:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:06,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 01:43:06,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 01:43:06,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-03 01:43:07,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840817179] [2022-11-03 01:43:07,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:43:07,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534285339] [2022-11-03 01:43:07,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534285339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:43:07,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735510740] [2022-11-03 01:43:07,176 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 01:43:07,176 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:07,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:07,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:07,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:09,343 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:43:09,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:11,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5419#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:11,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:11,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:11,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-11-03 01:43:11,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730686322] [2022-11-03 01:43:11,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:11,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:43:11,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:11,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:43:11,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-11-03 01:43:11,528 INFO L87 Difference]: Start difference. First operand 232 states and 254 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-03 01:43:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:12,223 INFO L93 Difference]: Finished difference Result 250 states and 272 transitions. [2022-11-03 01:43:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:43:12,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) Word has length 67 [2022-11-03 01:43:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:12,230 INFO L225 Difference]: With dead ends: 250 [2022-11-03 01:43:12,230 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 01:43:12,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:43:12,232 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:12,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 160 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:43:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 01:43:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 194. [2022-11-03 01:43:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 129 states have (on average 1.1162790697674418) internal successors, (144), 133 states have internal predecessors, (144), 36 states have call successors, (36), 29 states have call predecessors, (36), 28 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 01:43:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 214 transitions. [2022-11-03 01:43:12,296 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 214 transitions. Word has length 67 [2022-11-03 01:43:12,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:12,297 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 214 transitions. [2022-11-03 01:43:12,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-03 01:43:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 214 transitions. [2022-11-03 01:43:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 01:43:12,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:12,302 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:12,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:12,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:43:12,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash -319401384, now seen corresponding path program 1 times [2022-11-03 01:43:12,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:12,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355722686] [2022-11-03 01:43:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:12,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:12,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:43:12,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125956786] [2022-11-03 01:43:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:12,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:12,531 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:12,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:43:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:43:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-03 01:43:12,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:43:12,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:12,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355722686] [2022-11-03 01:43:12,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:43:12,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125956786] [2022-11-03 01:43:12,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125956786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:12,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:12,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:43:12,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068236675] [2022-11-03 01:43:12,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:12,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:43:12,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:12,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:43:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:12,645 INFO L87 Difference]: Start difference. First operand 194 states and 214 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 01:43:12,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:12,735 INFO L93 Difference]: Finished difference Result 211 states and 233 transitions. [2022-11-03 01:43:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:43:12,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 77 [2022-11-03 01:43:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:12,737 INFO L225 Difference]: With dead ends: 211 [2022-11-03 01:43:12,737 INFO L226 Difference]: Without dead ends: 191 [2022-11-03 01:43:12,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:43:12,738 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:12,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 78 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:43:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-03 01:43:12,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2022-11-03 01:43:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.088) internal successors, (136), 128 states have internal predecessors, (136), 34 states have call successors, (34), 27 states have call predecessors, (34), 27 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-03 01:43:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2022-11-03 01:43:12,781 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 77 [2022-11-03 01:43:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:12,781 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2022-11-03 01:43:12,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-03 01:43:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2022-11-03 01:43:12,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 01:43:12,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:12,783 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 01:43:12,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:13,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:43:13,001 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:13,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1528689375, now seen corresponding path program 3 times [2022-11-03 01:43:13,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:13,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521087907] [2022-11-03 01:43:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:13,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:13,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:43:13,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596205940] [2022-11-03 01:43:13,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:43:13,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:13,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:13,012 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:43:13,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:43:13,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:13,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 01:43:13,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-03 01:43:28,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:44:08,473 WARN L234 SmtUtils]: Spent 9.32s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:45:14,866 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse26 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse15 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse35 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse1 (+ .cse4 1)) (.cse3 (not .cse35)) (.cse5 (and .cse35 (not .cse2))) (.cse7 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse17 (not (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse15 |c_ULTIMATE.start_main_~r~0#1|)))) (.cse6 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse0 (* .cse26 |c_ULTIMATE.start_main_~B~0#1|))) (and (or (and (or (not (= .cse0 .cse1)) .cse2 .cse3) (or (not (= .cse4 .cse0)) .cse5)) (and (not .cse6) .cse7) (let ((.cse22 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse13 (< .cse26 0)) (.cse24 (+ .cse22 |c_ULTIMATE.start_main_~B~0#1|)) (.cse14 (div .cse0 2))) (let ((.cse16 (<= .cse0 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= .cse14 .cse22)) (.cse9 (= (mod .cse26 2) 0)) (.cse8 (= .cse14 .cse24)) (.cse11 (not .cse13))) (and (or (let ((.cse10 (not (<= (+ .cse14 .cse15) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse8 .cse9 .cse10 .cse11) (or .cse12 .cse10 .cse13))) .cse16 .cse17) (or (not .cse16) .cse17 (let ((.cse20 (= (mod .cse0 2) 0)) (.cse25 (< .cse0 0))) (let ((.cse23 (+ .cse14 1)) (.cse21 (not .cse25)) (.cse18 (and .cse25 (not .cse20))) (.cse19 (not (<= (+ .cse14 .cse15 .cse0) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse18 .cse12 .cse19) (or .cse20 .cse21 (= .cse22 .cse23))) .cse13) (or .cse9 (and (or (= .cse23 .cse24) .cse21) (or .cse8 .cse18 .cse19)) .cse11))))))))) (= .cse26 1)) (let ((.cse27 (+ |c_ULTIMATE.start_main_~B~0#1| .cse0))) (or (and (or .cse2 (not (= .cse1 .cse27)) .cse3) (or (not (= .cse4 .cse27)) .cse5)) (not .cse7) (let ((.cse33 (+ .cse26 1))) (let ((.cse34 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse33 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse28 (div .cse27 2))) (let ((.cse29 (= .cse34 .cse28)) (.cse30 (<= .cse27 |c_ULTIMATE.start_main_~r~0#1|)) (.cse31 (= (mod .cse33 2) 0))) (and (or (not (<= (+ .cse15 .cse28) |c_ULTIMATE.start_main_~A~0#1|)) .cse17 .cse29 .cse30 .cse31) (or (let ((.cse32 (< .cse27 0))) (and (or (not (<= (+ .cse15 .cse28 |c_ULTIMATE.start_main_~B~0#1| .cse0) |c_ULTIMATE.start_main_~A~0#1|)) .cse29 (and .cse32 (not (= (mod (* .cse33 |c_ULTIMATE.start_main_~B~0#1|) 2) 0)))) (or (not .cse32) (= .cse34 (+ .cse28 1))))) (not .cse30) .cse17 .cse31))))) .cse6))))) is different from false [2022-11-03 01:47:38,495 WARN L234 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:49:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 113 proven. 24 refuted. 0 times theorem prover too weak. 222 trivial. 8 not checked. [2022-11-03 01:49:05,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:05,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521087907] [2022-11-03 01:49:05,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:49:05,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596205940] [2022-11-03 01:49:05,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596205940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:05,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195932161] [2022-11-03 01:49:05,575 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:49:05,575 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:05,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:05,576 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:05,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:08,988 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:49:08,999 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:49:14,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7403#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:49:14,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:49:14,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:49:14,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-11-03 01:49:14,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656620640] [2022-11-03 01:49:14,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:49:14,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 01:49:14,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 01:49:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=991, Unknown=2, NotChecked=66, Total=1260 [2022-11-03 01:49:14,571 INFO L87 Difference]: Start difference. First operand 187 states and 203 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 15 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-03 01:49:25,352 WARN L234 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 151 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:49:37,398 WARN L234 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 151 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:49:48,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:49:57,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:00,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:02,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:03,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:05,551 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse28 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse17 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse37 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse6 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse0 (- |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse1 (* (div .cse0 (- 4)) |c_ULTIMATE.start_main_~B~0#1|)) (.cse3 (+ .cse6 1)) (.cse5 (not .cse37)) (.cse7 (and .cse37 (not .cse4))) (.cse9 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse19 (not (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse17 |c_ULTIMATE.start_main_~r~0#1|)))) (.cse2 (* .cse28 |c_ULTIMATE.start_main_~B~0#1|)) (.cse8 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (= (mod (div .cse0 (- 2)) 2) 0) (not (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (= |c_ULTIMATE.start_main_~d~0#1| (* .cse1 4)) (or (and (or (not (= .cse2 .cse3)) .cse4 .cse5) (or (not (= .cse6 .cse2)) .cse7)) (and (not .cse8) .cse9) (let ((.cse24 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse15 (< .cse28 0)) (.cse26 (+ .cse24 |c_ULTIMATE.start_main_~B~0#1|)) (.cse16 (div .cse2 2))) (let ((.cse18 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse14 (= .cse16 .cse24)) (.cse11 (= (mod .cse28 2) 0)) (.cse10 (= .cse16 .cse26)) (.cse13 (not .cse15))) (and (or (let ((.cse12 (not (<= (+ .cse16 .cse17) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse10 .cse11 .cse12 .cse13) (or .cse14 .cse12 .cse15))) .cse18 .cse19) (or (not .cse18) .cse19 (let ((.cse22 (= (mod .cse2 2) 0)) (.cse27 (< .cse2 0))) (let ((.cse25 (+ .cse16 1)) (.cse23 (not .cse27)) (.cse20 (and .cse27 (not .cse22))) (.cse21 (not (<= (+ .cse16 .cse17 .cse2) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse20 .cse14 .cse21) (or .cse22 .cse23 (= .cse24 .cse25))) .cse15) (or .cse11 (and (or (= .cse25 .cse26) .cse23) (or .cse10 .cse20 .cse21)) .cse13))))))))) (= .cse28 1)) (= 0 |c_ULTIMATE.start_main_~q~0#1|) (<= (* 2 .cse1) |c_ULTIMATE.start_main_~r~0#1|) (let ((.cse29 (+ |c_ULTIMATE.start_main_~B~0#1| .cse2))) (or (and (or .cse4 (not (= .cse3 .cse29)) .cse5) (or (not (= .cse6 .cse29)) .cse7)) (not .cse9) (let ((.cse35 (+ .cse28 1))) (let ((.cse36 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse35 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse30 (div .cse29 2))) (let ((.cse31 (= .cse36 .cse30)) (.cse32 (<= .cse29 |c_ULTIMATE.start_main_~r~0#1|)) (.cse33 (= (mod .cse35 2) 0))) (and (or (not (<= (+ .cse17 .cse30) |c_ULTIMATE.start_main_~A~0#1|)) .cse19 .cse31 .cse32 .cse33) (or (let ((.cse34 (< .cse29 0))) (and (or (not (<= (+ .cse17 .cse30 |c_ULTIMATE.start_main_~B~0#1| .cse2) |c_ULTIMATE.start_main_~A~0#1|)) .cse31 (and .cse34 (not (= (mod (* .cse35 |c_ULTIMATE.start_main_~B~0#1|) 2) 0)))) (or (not .cse34) (= .cse36 (+ .cse30 1))))) (not .cse32) .cse19 .cse33))))) .cse8)) (= |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|) .cse8))) is different from false [2022-11-03 01:50:07,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:09,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:11,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:12,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:13,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:16,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:18,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:21,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:22,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:32,396 WARN L234 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 120 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:43,917 WARN L234 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 149 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:46,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:47,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:49,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:50:51,933 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse14 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (- |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse1 (* (div .cse0 (- 4)) |c_ULTIMATE.start_main_~B~0#1|)) (.cse20 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse14 |c_ULTIMATE.start_main_~r~0#1|))) (.cse2 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0))) (and (= (mod (div .cse0 (- 2)) 2) 0) (= |c_ULTIMATE.start_main_~d~0#1| (* .cse1 4)) (<= (* 2 .cse1) |c_ULTIMATE.start_main_~r~0#1|) (or (not (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|)) (let ((.cse18 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse19 (<= (+ .cse18 1) |c_ULTIMATE.start_main_~r~0#1|)) (.cse17 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse21 (<= .cse18 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse3 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse10 (or .cse21 .cse20)) (.cse11 (not .cse21)) (.cse12 (+ .cse18 |c_ULTIMATE.start_main_~A~0#1|)) (.cse13 (and .cse17 (not .cse4))) (.cse5 (or .cse19 .cse20)) (.cse6 (not .cse19)) (.cse7 (+ .cse18 |c_ULTIMATE.start_main_~A~0#1| 1)) (.cse9 (not .cse17)) (.cse15 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~B~0#1|))) (and (or (and (not .cse2) .cse3) (let ((.cse8 (+ .cse14 |c_ULTIMATE.start_main_~r~0#1| .cse15))) (and (or .cse4 (and .cse5 (or .cse6 (= .cse7 .cse8))) .cse9) (or (and .cse10 (or .cse11 (= .cse12 .cse8))) .cse13)))) (or (not .cse3) (let ((.cse16 (+ .cse14 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse15))) (and (or (and .cse10 (or .cse11 (= .cse12 .cse16))) .cse13) (or (and .cse5 (or .cse6 (= .cse7 .cse16))) .cse4 .cse9))) .cse2))))) (= |c_ULTIMATE.start_main_~p~0#1| 1)) (= |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|) .cse20 .cse2))) is different from false [2022-11-03 01:51:05,950 WARN L234 SmtUtils]: Spent 11.53s on a formula simplification. DAG size of input: 149 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:08,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:51:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:09,207 INFO L93 Difference]: Finished difference Result 240 states and 270 transitions. [2022-11-03 01:51:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:51:09,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 15 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) Word has length 87 [2022-11-03 01:51:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:09,210 INFO L225 Difference]: With dead ends: 240 [2022-11-03 01:51:09,210 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 01:51:09,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 222 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 125.5s TimeCoverageRelationStatistics Valid=321, Invalid=1574, Unknown=9, NotChecked=258, Total=2162 [2022-11-03 01:51:09,214 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 74 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 116 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 42.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:09,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 267 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 482 Invalid, 6 Unknown, 203 Unchecked, 42.1s Time] [2022-11-03 01:51:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 01:51:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 212. [2022-11-03 01:51:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 148 states have internal predecessors, (156), 37 states have call successors, (37), 31 states have call predecessors, (37), 31 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-03 01:51:09,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 229 transitions. [2022-11-03 01:51:09,318 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 229 transitions. Word has length 87 [2022-11-03 01:51:09,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:09,318 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 229 transitions. [2022-11-03 01:51:09,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 15 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 12 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-03 01:51:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 229 transitions. [2022-11-03 01:51:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 01:51:09,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:09,320 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 01:51:09,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:09,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:09,537 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1786736423, now seen corresponding path program 4 times [2022-11-03 01:51:09,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575954603] [2022-11-03 01:51:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:09,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:09,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:51:09,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979274430] [2022-11-03 01:51:09,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:51:09,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:09,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:09,548 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:09,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:51:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:09,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:51:09,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 28 proven. 31 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-03 01:51:09,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 28 proven. 31 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-03 01:51:37,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:37,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575954603] [2022-11-03 01:51:37,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:51:37,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979274430] [2022-11-03 01:51:37,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979274430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:37,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657455396] [2022-11-03 01:51:37,812 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:51:37,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:37,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:37,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:37,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:40,948 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:51:40,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:42,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8643#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:42,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:42,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:51:42,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-03 01:51:42,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989428257] [2022-11-03 01:51:42,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:42,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:51:42,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:51:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:51:42,245 INFO L87 Difference]: Start difference. First operand 212 states and 229 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 7 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-03 01:51:57,221 WARN L234 SmtUtils]: Spent 14.71s on a formula simplification. DAG size of input: 128 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:58,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:52:03,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:52:06,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 01:52:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:06,027 INFO L93 Difference]: Finished difference Result 248 states and 279 transitions. [2022-11-03 01:52:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 01:52:06,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 7 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 92 [2022-11-03 01:52:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:06,029 INFO L225 Difference]: With dead ends: 248 [2022-11-03 01:52:06,029 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 01:52:06,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 243 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:52:06,030 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 25 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:06,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 222 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 224 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-11-03 01:52:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 01:52:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 189. [2022-11-03 01:52:06,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 131 states have internal predecessors, (138), 34 states have call successors, (34), 28 states have call predecessors, (34), 28 states have return successors, (33), 29 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-03 01:52:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 205 transitions. [2022-11-03 01:52:06,136 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 205 transitions. Word has length 92 [2022-11-03 01:52:06,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:06,137 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 205 transitions. [2022-11-03 01:52:06,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 7 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-03 01:52:06,137 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 205 transitions. [2022-11-03 01:52:06,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:52:06,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:06,138 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:06,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:06,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:52:06,357 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:06,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1631100676, now seen corresponding path program 1 times [2022-11-03 01:52:06,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:06,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086328018] [2022-11-03 01:52:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:06,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:06,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:52:06,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161852194] [2022-11-03 01:52:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:06,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:06,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:06,373 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:06,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:52:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:52:06,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 01:52:06,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-03 01:52:06,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:06,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086328018] [2022-11-03 01:52:06,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:52:06,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161852194] [2022-11-03 01:52:06,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161852194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:06,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1513980577] [2022-11-03 01:52:06,670 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 01:52:06,670 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:06,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:06,670 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:06,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:07,790 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-03 01:52:07,806 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:09,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9855#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 01:52:09,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:09,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:09,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-03 01:52:09,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334019374] [2022-11-03 01:52:09,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:09,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:52:09,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:09,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:52:09,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-11-03 01:52:09,449 INFO L87 Difference]: Start difference. First operand 189 states and 205 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-03 01:52:10,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:10,083 INFO L93 Difference]: Finished difference Result 488 states and 542 transitions. [2022-11-03 01:52:10,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 01:52:10,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 94 [2022-11-03 01:52:10,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:10,087 INFO L225 Difference]: With dead ends: 488 [2022-11-03 01:52:10,088 INFO L226 Difference]: Without dead ends: 434 [2022-11-03 01:52:10,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:52:10,089 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 136 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:10,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 230 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:52:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-03 01:52:10,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 314. [2022-11-03 01:52:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 209 states have (on average 1.1004784688995215) internal successors, (230), 217 states have internal predecessors, (230), 56 states have call successors, (56), 48 states have call predecessors, (56), 48 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-03 01:52:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 340 transitions. [2022-11-03 01:52:10,235 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 340 transitions. Word has length 94 [2022-11-03 01:52:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:10,235 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 340 transitions. [2022-11-03 01:52:10,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-03 01:52:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 340 transitions. [2022-11-03 01:52:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 01:52:10,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:10,238 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:10,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:10,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:52:10,460 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1569405118, now seen corresponding path program 1 times [2022-11-03 01:52:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:10,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393354542] [2022-11-03 01:52:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:10,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:10,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:52:10,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716324459] [2022-11-03 01:52:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:10,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:10,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:10,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:10,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:52:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:52:10,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 32 proven. 469 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 01:52:10,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-11-03 01:52:10,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:10,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393354542] [2022-11-03 01:52:10,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:52:10,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716324459] [2022-11-03 01:52:10,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716324459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:10,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [39614093] [2022-11-03 01:52:10,851 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 01:52:10,851 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:10,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:10,852 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:10,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:12,842 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-03 01:52:12,856 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:14,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11653#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 01:52:14,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:14,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:14,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-11-03 01:52:14,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076396438] [2022-11-03 01:52:14,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:14,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:52:14,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:14,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:52:14,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:52:14,616 INFO L87 Difference]: Start difference. First operand 314 states and 340 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 10 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-03 01:52:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:15,238 INFO L93 Difference]: Finished difference Result 459 states and 501 transitions. [2022-11-03 01:52:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:52:15,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 10 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) Word has length 105 [2022-11-03 01:52:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:15,241 INFO L225 Difference]: With dead ends: 459 [2022-11-03 01:52:15,242 INFO L226 Difference]: Without dead ends: 433 [2022-11-03 01:52:15,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 277 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:52:15,243 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 154 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:15,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 286 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:52:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-03 01:52:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 427. [2022-11-03 01:52:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 286 states have (on average 1.06993006993007) internal successors, (306), 294 states have internal predecessors, (306), 77 states have call successors, (77), 64 states have call predecessors, (77), 63 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2022-11-03 01:52:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 456 transitions. [2022-11-03 01:52:15,392 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 456 transitions. Word has length 105 [2022-11-03 01:52:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:15,393 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 456 transitions. [2022-11-03 01:52:15,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 10 states have call successors, (33), 8 states have call predecessors, (33), 7 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-03 01:52:15,394 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 456 transitions. [2022-11-03 01:52:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 01:52:15,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:15,395 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-03 01:52:15,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:52:15,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash 97904943, now seen corresponding path program 5 times [2022-11-03 01:52:15,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:15,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448498033] [2022-11-03 01:52:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:15,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:52:15,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897931344] [2022-11-03 01:52:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:15,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:15,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:15,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:15,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:52:15,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:52:15,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:52:15,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2022-11-03 01:52:16,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:41,050 WARN L234 SmtUtils]: Spent 17.77s on a formula simplification. DAG size of input: 143 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:52:41,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:41,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448498033] [2022-11-03 01:52:41,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:52:41,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897931344] [2022-11-03 01:52:41,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897931344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:41,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877207883] [2022-11-03 01:52:41,059 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 01:52:41,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:41,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:41,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:41,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:43,153 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:52:43,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:44,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13310#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:44,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:44,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:52:44,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-03 01:52:44,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622278412] [2022-11-03 01:52:44,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:44,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:52:44,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:52:44,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=483, Unknown=2, NotChecked=0, Total=600 [2022-11-03 01:52:44,844 INFO L87 Difference]: Start difference. First operand 427 states and 456 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:52:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:45,239 INFO L93 Difference]: Finished difference Result 441 states and 469 transitions. [2022-11-03 01:52:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:52:45,240 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 118 [2022-11-03 01:52:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:45,243 INFO L225 Difference]: With dead ends: 441 [2022-11-03 01:52:45,243 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 01:52:45,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 210 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=127, Invalid=573, Unknown=2, NotChecked=0, Total=702 [2022-11-03 01:52:45,245 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:45,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 50 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:45,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 01:52:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 419. [2022-11-03 01:52:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 283 states have (on average 1.0636042402826855) internal successors, (301), 289 states have internal predecessors, (301), 73 states have call successors, (73), 63 states have call predecessors, (73), 62 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-03 01:52:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 445 transitions. [2022-11-03 01:52:45,469 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 445 transitions. Word has length 118 [2022-11-03 01:52:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:45,470 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 445 transitions. [2022-11-03 01:52:45,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:52:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 445 transitions. [2022-11-03 01:52:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 01:52:45,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:45,472 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:45,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:45,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:52:45,697 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:45,697 INFO L85 PathProgramCache]: Analyzing trace with hash 720403169, now seen corresponding path program 1 times [2022-11-03 01:52:45,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:45,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90506746] [2022-11-03 01:52:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:45,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:45,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:52:45,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998158977] [2022-11-03 01:52:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:45,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:45,710 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:45,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:52:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:45,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:52:45,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 144 proven. 15 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2022-11-03 01:52:45,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 74 proven. 15 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-11-03 01:52:46,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:46,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90506746] [2022-11-03 01:52:46,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:52:46,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998158977] [2022-11-03 01:52:46,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998158977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:46,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615522657] [2022-11-03 01:52:46,100 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 01:52:46,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:46,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:46,101 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:46,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:48,329 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-03 01:52:48,344 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:50,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15261#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 01:52:50,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:50,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:50,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-11-03 01:52:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962911650] [2022-11-03 01:52:50,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:50,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:52:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:52:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:52:50,163 INFO L87 Difference]: Start difference. First operand 419 states and 445 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-03 01:52:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:50,458 INFO L93 Difference]: Finished difference Result 448 states and 479 transitions. [2022-11-03 01:52:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:52:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 121 [2022-11-03 01:52:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:50,461 INFO L225 Difference]: With dead ends: 448 [2022-11-03 01:52:50,462 INFO L226 Difference]: Without dead ends: 428 [2022-11-03 01:52:50,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 329 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:52:50,463 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:50,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-03 01:52:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 422. [2022-11-03 01:52:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 286 states have (on average 1.0594405594405594) internal successors, (303), 289 states have internal predecessors, (303), 73 states have call successors, (73), 63 states have call predecessors, (73), 62 states have return successors, (71), 69 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-03 01:52:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 447 transitions. [2022-11-03 01:52:50,688 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 447 transitions. Word has length 121 [2022-11-03 01:52:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:50,689 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 447 transitions. [2022-11-03 01:52:50,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-03 01:52:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 447 transitions. [2022-11-03 01:52:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 01:52:50,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:50,691 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:50,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:50,905 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:50,905 INFO L85 PathProgramCache]: Analyzing trace with hash -997748408, now seen corresponding path program 2 times [2022-11-03 01:52:50,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:50,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574265789] [2022-11-03 01:52:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:50,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:52:50,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104293893] [2022-11-03 01:52:50,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:50,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:50,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:50,920 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:50,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 01:52:50,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 01:52:50,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:52:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2022-11-03 01:52:51,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2022-11-03 01:52:51,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:51,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574265789] [2022-11-03 01:52:51,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:52:51,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104293893] [2022-11-03 01:52:51,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104293893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:51,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525477] [2022-11-03 01:52:51,300 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 01:52:51,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:51,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:51,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:51,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:53,605 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-11-03 01:52:53,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:55,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17310#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-03 01:52:55,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:55,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:52:55,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-03 01:52:55,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612208298] [2022-11-03 01:52:55,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:55,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:52:55,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:55,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:52:55,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-03 01:52:55,662 INFO L87 Difference]: Start difference. First operand 422 states and 447 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 01:52:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:56,064 INFO L93 Difference]: Finished difference Result 442 states and 464 transitions. [2022-11-03 01:52:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:52:56,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 134 [2022-11-03 01:52:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:56,067 INFO L225 Difference]: With dead ends: 442 [2022-11-03 01:52:56,068 INFO L226 Difference]: Without dead ends: 426 [2022-11-03 01:52:56,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 366 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:52:56,069 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:56,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 60 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:56,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-03 01:52:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 289. [2022-11-03 01:52:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 195 states have (on average 1.0615384615384615) internal successors, (207), 199 states have internal predecessors, (207), 48 states have call successors, (48), 45 states have call predecessors, (48), 45 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-03 01:52:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 302 transitions. [2022-11-03 01:52:56,258 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 302 transitions. Word has length 134 [2022-11-03 01:52:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:56,258 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 302 transitions. [2022-11-03 01:52:56,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 01:52:56,258 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 302 transitions. [2022-11-03 01:52:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 01:52:56,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:56,261 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:56,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:56,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:56,479 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1099461118, now seen corresponding path program 2 times [2022-11-03 01:52:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:56,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55127121] [2022-11-03 01:52:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:56,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:52:56,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585918910] [2022-11-03 01:52:56,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:52:56,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:56,493 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:56,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:52:56,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-03 01:52:56,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:52:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 01:52:56,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 321 proven. 82 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2022-11-03 01:52:57,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:04,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:04,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55127121] [2022-11-03 01:53:04,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:53:04,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585918910] [2022-11-03 01:53:04,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585918910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:04,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671173286] [2022-11-03 01:53:04,203 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 01:53:04,203 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:04,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:04,204 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:04,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:07,621 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:53:07,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:09,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18936#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:09,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:09,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:53:09,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-03 01:53:09,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560010294] [2022-11-03 01:53:09,114 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:09,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 01:53:09,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:09,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 01:53:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=600, Unknown=1, NotChecked=0, Total=702 [2022-11-03 01:53:09,115 INFO L87 Difference]: Start difference. First operand 289 states and 302 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 01:53:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:09,843 INFO L93 Difference]: Finished difference Result 332 states and 354 transitions. [2022-11-03 01:53:09,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:53:09,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 157 [2022-11-03 01:53:09,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:09,846 INFO L225 Difference]: With dead ends: 332 [2022-11-03 01:53:09,846 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 01:53:09,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 310 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=107, Invalid=648, Unknown=1, NotChecked=0, Total=756 [2022-11-03 01:53:09,847 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:09,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 225 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:53:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 01:53:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-11-03 01:53:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 186 states have (on average 1.0591397849462365) internal successors, (197), 190 states have internal predecessors, (197), 46 states have call successors, (46), 43 states have call predecessors, (46), 43 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-03 01:53:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 288 transitions. [2022-11-03 01:53:10,002 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 288 transitions. Word has length 157 [2022-11-03 01:53:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:10,002 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 288 transitions. [2022-11-03 01:53:10,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 01:53:10,003 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 288 transitions. [2022-11-03 01:53:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 01:53:10,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:10,005 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:10,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:10,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:10,221 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash 502063744, now seen corresponding path program 3 times [2022-11-03 01:53:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:10,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761149721] [2022-11-03 01:53:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:10,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:53:10,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688388505] [2022-11-03 01:53:10,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:53:10,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:10,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:10,233 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:10,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 01:53:10,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:53:10,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:10,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 01:53:10,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 60 proven. 110 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-11-03 01:53:10,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 75 proven. 95 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-11-03 01:53:11,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:11,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761149721] [2022-11-03 01:53:11,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:53:11,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688388505] [2022-11-03 01:53:11,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688388505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:11,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102648876] [2022-11-03 01:53:11,783 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-03 01:53:11,783 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:11,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:11,784 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:11,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:14,868 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-03 01:53:14,878 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:16,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20781#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:16,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:16,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:53:16,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-03 01:53:16,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327311805] [2022-11-03 01:53:16,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:16,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:53:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:16,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:53:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:53:16,319 INFO L87 Difference]: Start difference. First operand 276 states and 288 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 10 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2022-11-03 01:53:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:16,748 INFO L93 Difference]: Finished difference Result 317 states and 338 transitions. [2022-11-03 01:53:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:53:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 10 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) Word has length 162 [2022-11-03 01:53:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:16,753 INFO L225 Difference]: With dead ends: 317 [2022-11-03 01:53:16,753 INFO L226 Difference]: Without dead ends: 263 [2022-11-03 01:53:16,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 448 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:53:16,754 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:16,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 319 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:53:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-03 01:53:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-03 01:53:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 177 states have (on average 1.0564971751412429) internal successors, (187), 181 states have internal predecessors, (187), 44 states have call successors, (44), 41 states have call predecessors, (44), 41 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-03 01:53:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 274 transitions. [2022-11-03 01:53:16,922 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 274 transitions. Word has length 162 [2022-11-03 01:53:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:16,923 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 274 transitions. [2022-11-03 01:53:16,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 10 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2022-11-03 01:53:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 274 transitions. [2022-11-03 01:53:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 01:53:16,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:16,924 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:16,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:17,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 01:53:17,141 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:17,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash 65859380, now seen corresponding path program 4 times [2022-11-03 01:53:17,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:17,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098735708] [2022-11-03 01:53:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:17,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:53:17,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990950751] [2022-11-03 01:53:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:53:17,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:17,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:17,158 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:17,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 01:53:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:53:17,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:53:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:53:17,393 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:53:17,393 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:53:17,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:53:17,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:17,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 01:53:17,623 INFO L444 BasicCegarLoop]: Path program histogram: [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:17,627 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:53:17,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:53:17 BoogieIcfgContainer [2022-11-03 01:53:17,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:53:17,703 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:53:17,703 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:53:17,703 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:53:17,704 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:42:36" (3/4) ... [2022-11-03 01:53:17,706 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 01:53:17,775 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 01:53:17,775 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:53:17,775 INFO L158 Benchmark]: Toolchain (without parser) took 642019.23ms. Allocated memory was 109.1MB in the beginning and 281.0MB in the end (delta: 172.0MB). Free memory was 65.8MB in the beginning and 168.2MB in the end (delta: -102.4MB). Peak memory consumption was 68.1MB. Max. memory is 16.1GB. [2022-11-03 01:53:17,776 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:53:17,776 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.69ms. Allocated memory is still 109.1MB. Free memory was 65.6MB in the beginning and 82.9MB in the end (delta: -17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:53:17,776 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.99ms. Allocated memory is still 109.1MB. Free memory was 82.9MB in the beginning and 81.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:53:17,777 INFO L158 Benchmark]: Boogie Preprocessor took 46.84ms. Allocated memory is still 109.1MB. Free memory was 81.3MB in the beginning and 80.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:53:17,777 INFO L158 Benchmark]: RCFGBuilder took 345.88ms. Allocated memory is still 109.1MB. Free memory was 80.2MB in the beginning and 67.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 01:53:17,777 INFO L158 Benchmark]: TraceAbstraction took 641192.84ms. Allocated memory was 109.1MB in the beginning and 281.0MB in the end (delta: 172.0MB). Free memory was 67.0MB in the beginning and 174.5MB in the end (delta: -107.5MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. [2022-11-03 01:53:17,777 INFO L158 Benchmark]: Witness Printer took 72.31ms. Allocated memory is still 281.0MB. Free memory was 174.5MB in the beginning and 168.2MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 01:53:17,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 109.1MB. Free memory is still 81.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.69ms. Allocated memory is still 109.1MB. Free memory was 65.6MB in the beginning and 82.9MB in the end (delta: -17.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.99ms. Allocated memory is still 109.1MB. Free memory was 82.9MB in the beginning and 81.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.84ms. Allocated memory is still 109.1MB. Free memory was 81.3MB in the beginning and 80.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 345.88ms. Allocated memory is still 109.1MB. Free memory was 80.2MB in the beginning and 67.9MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 641192.84ms. Allocated memory was 109.1MB in the beginning and 281.0MB in the end (delta: 172.0MB). Free memory was 67.0MB in the beginning and 174.5MB in the end (delta: -107.5MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. * Witness Printer took 72.31ms. Allocated memory is still 281.0MB. Free memory was 174.5MB in the beginning and 168.2MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=28, B=1, counter=0, d=1, p=1, q=0, r=28] [L34] EXPR counter++ VAL [A=28, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=28] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=28, B=1, counter=1, d=1, p=1, q=0, r=28] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=28, B=1, counter=1, d=1, p=1, q=0, r=28] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=28, B=1, counter=1, d=1, p=1, q=0, r=28] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=28, B=1, counter=1, d=2, p=2, q=0, r=28] [L34] EXPR counter++ VAL [A=28, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=28] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=28, B=1, counter=2, d=2, p=2, q=0, r=28] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=28, B=1, counter=2, d=2, p=2, q=0, r=28] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=28, B=1, counter=2, d=2, p=2, q=0, r=28] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=28, B=1, counter=2, d=4, p=4, q=0, r=28] [L34] EXPR counter++ VAL [A=28, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=28] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [A=28, B=1, counter=3, d=4, p=4, q=0, r=28] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [A=28, B=1, counter=3, d=4, p=4, q=0, r=28] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=28, B=1, counter=3, d=4, p=4, q=0, r=28] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=28, B=1, counter=3, d=8, p=8, q=0, r=28] [L34] EXPR counter++ VAL [A=28, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=28] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [A=28, B=1, counter=4, d=8, p=8, q=0, r=28] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [A=28, B=1, counter=4, d=8, p=8, q=0, r=28] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=28, B=1, counter=4, d=8, p=8, q=0, r=28] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=28, B=1, counter=4, d=16, p=16, q=0, r=28] [L34] EXPR counter++ VAL [A=28, B=1, counter=5, counter++=4, d=16, p=16, q=0, r=28] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(q == 0) VAL [A=28, B=1, counter=5, d=16, p=16, q=0, r=28] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(r == A) VAL [A=28, B=1, counter=5, d=16, p=16, q=0, r=28] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=28, B=1, counter=5, d=16, p=16, q=0, r=28] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=28, B=1, counter=5, d=32, p=32, q=0, r=28] [L34] EXPR counter++ VAL [A=28, B=1, counter=6, counter++=5, d=32, p=32, q=0, r=28] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(q == 0) VAL [A=28, B=1, counter=6, d=32, p=32, q=0, r=28] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(r == A) VAL [A=28, B=1, counter=6, d=32, p=32, q=0, r=28] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=28, B=1, counter=6, d=32, p=32, q=0, r=28] [L38] COND TRUE !(r >= d) VAL [A=28, B=1, counter=6, d=32, p=32, q=0, r=28] [L44] EXPR counter++ VAL [A=28, B=1, counter=7, counter++=6, d=32, p=32, q=0, r=28] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=28, B=1, counter=7, d=32, p=32, q=0, r=28] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=28, B=1, counter=7, d=32, p=32, q=0, r=28] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=28, B=1, counter=7, d=16, p=16, q=16, r=12] [L44] EXPR counter++ VAL [A=28, B=1, counter=8, counter++=7, d=16, p=16, q=16, r=12] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=28, B=1, counter=8, d=16, p=16, q=16, r=12] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=28, B=1, counter=8, d=16, p=16, q=16, r=12] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=28, B=1, counter=8, d=8, p=8, q=24, r=4] [L44] EXPR counter++ VAL [A=28, B=1, counter=9, counter++=8, d=8, p=8, q=24, r=4] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=28, B=1, counter=9, d=8, p=8, q=24, r=4] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=28, B=1, counter=9, d=8, p=8, q=24, r=4] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=28, B=1, counter=9, d=4, p=4, q=28, r=0] [L44] EXPR counter++ VAL [A=28, B=1, counter=10, counter++=9, d=4, p=4, q=28, r=0] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=28, B=1, counter=10, d=4, p=4, q=28, r=0] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=28, B=1, counter=10, d=4, p=4, q=28, r=0] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND FALSE !(r >= d) VAL [A=28, B=1, counter=10, d=2, p=2, q=28, r=0] [L44] EXPR counter++ VAL [A=28, B=1, counter=11, counter++=10, d=2, p=2, q=28, r=0] [L44] COND FALSE !(counter++<10) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 641.0s, OverallIterations: 23, TraceHistogramMax: 27, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 149.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 853 SdHoareTripleChecker+Valid, 53.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 777 mSDsluCounter, 3187 SdHoareTripleChecker+Invalid, 52.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 203 IncrementalHoareTripleChecker+Unchecked, 2349 mSDsCounter, 639 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3305 IncrementalHoareTripleChecker+Invalid, 4155 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 639 mSolverCounterUnsat, 905 mSDtfsCounter, 3305 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4014 GetRequests, 3491 SyntacticMatches, 114 SemanticMatches, 409 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 199.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=427occurred in iteration=17, InterpolantAutomatonStates: 199, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 22 MinimizatonAttempts, 395 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 421.9s InterpolantComputationTime, 1706 NumberOfCodeBlocks, 1549 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 2582 ConstructedInterpolants, 8 QuantifiedInterpolants, 26751 SizeOfPredicates, 57 NumberOfNonLiveVariables, 3507 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 35 InterpolantComputations, 8 PerfectInterpolantSequences, 12076/13495 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-03 01:53:17,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afcf55c1-3055-436e-b1e6-3022ce664155/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE