./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd2-ll.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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- 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 02:18:03,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:18:03,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:18:03,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:18:03,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:18:03,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:18:03,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:18:03,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:18:03,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:18:03,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:18:03,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:18:03,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:18:03,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:18:03,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:18:03,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:18:03,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:18:03,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:18:03,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:18:03,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:18:03,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:18:03,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:18:03,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:18:03,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:18:03,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:18:03,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:18:03,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:18:03,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:18:03,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:18:03,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:18:03,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:18:03,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:18:03,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:18:03,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:18:03,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:18:03,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:18:03,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:18:03,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:18:03,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:18:03,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:18:03,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:18:03,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:18:03,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:18:03,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:18:03,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:18:03,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:18:03,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:18:03,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:18:03,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:18:03,625 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:18:03,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:18:03,626 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:18:03,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:18:03,626 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:18:03,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:18:03,627 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:18:03,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:18:03,628 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:18:03,628 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:18:03,628 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:18:03,629 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:18:03,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:18:03,630 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:18:03,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:18:03,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:18:03,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:18:03,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:18:03,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:18:03,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:18:03,632 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:18:03,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:18:03,633 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:18:03,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:18:03,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:18:03,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:18:03,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:18:03,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:18:03,635 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:18:03,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:18:03,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:18:03,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:18:03,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:18:03,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:18:03,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:18:03,637 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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2022-11-03 02:18:04,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:18:04,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:18:04,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:18:04,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:18:04,041 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:18:04,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-11-03 02:18:04,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data/db86bf572/532a5d223a7347dda35b9d40a8bd631c/FLAGc927b3ca1 [2022-11-03 02:18:04,802 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:18:04,804 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-11-03 02:18:04,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data/db86bf572/532a5d223a7347dda35b9d40a8bd631c/FLAGc927b3ca1 [2022-11-03 02:18:05,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data/db86bf572/532a5d223a7347dda35b9d40a8bd631c [2022-11-03 02:18:05,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:18:05,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:18:05,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:18:05,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:18:05,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:18:05,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3ac88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05, skipping insertion in model container [2022-11-03 02:18:05,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:18:05,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:18:05,423 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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2022-11-03 02:18:05,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:18:05,454 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:18:05,465 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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2022-11-03 02:18:05,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:18:05,493 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:18:05,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05 WrapperNode [2022-11-03 02:18:05,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:18:05,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:18:05,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:18:05,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:18:05,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,533 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2022-11-03 02:18:05,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:18:05,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:18:05,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:18:05,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:18:05,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,579 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:18:05,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:18:05,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:18:05,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:18:05,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (1/1) ... [2022-11-03 02:18:05,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:18:05,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:05,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:18:05,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:18:05,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:18:05,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:18:05,706 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:18:05,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:18:05,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:18:05,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:18:05,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:18:05,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:18:05,799 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:18:05,801 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:18:05,984 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:18:06,014 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:18:06,014 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:18:06,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:06 BoogieIcfgContainer [2022-11-03 02:18:06,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:18:06,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:18:06,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:18:06,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:18:06,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:18:05" (1/3) ... [2022-11-03 02:18:06,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315498d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:06, skipping insertion in model container [2022-11-03 02:18:06,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:18:05" (2/3) ... [2022-11-03 02:18:06,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315498d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:18:06, skipping insertion in model container [2022-11-03 02:18:06,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:06" (3/3) ... [2022-11-03 02:18:06,028 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-11-03 02:18:06,052 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:18:06,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:18:06,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:18:06,160 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;@4d95d5dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:18:06,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:18:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-03 02:18:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:18:06,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:06,177 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:06,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1444820577, now seen corresponding path program 1 times [2022-11-03 02:18:06,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:06,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126574896] [2022-11-03 02:18:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:06,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:06,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:18:06,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011892794] [2022-11-03 02:18:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:06,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:06,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:06,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:06,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:18:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:06,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:18:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:18:06,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:06,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126574896] [2022-11-03 02:18:06,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:18:06,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011892794] [2022-11-03 02:18:06,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011892794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:06,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:06,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:18:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615150828] [2022-11-03 02:18:06,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:06,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:18:06,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:06,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:18:06,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:18:06,630 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:18:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:06,704 INFO L93 Difference]: Finished difference Result 46 states and 73 transitions. [2022-11-03 02:18:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:18:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2022-11-03 02:18:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:06,719 INFO L225 Difference]: With dead ends: 46 [2022-11-03 02:18:06,720 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 02:18:06,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 02:18:06,731 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:06,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:18:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 02:18:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-03 02:18:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:18:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-11-03 02:18:06,851 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 19 [2022-11-03 02:18:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:06,854 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-11-03 02:18:06,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:18:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-11-03 02:18:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:18:06,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:06,859 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:06,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:07,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 02:18:07,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash -599376077, now seen corresponding path program 1 times [2022-11-03 02:18:07,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:07,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626403392] [2022-11-03 02:18:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:07,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:07,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:18:07,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496074297] [2022-11-03 02:18:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:07,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:07,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:07,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:07,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:18:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:18:07,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:18:07,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:18:07,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:07,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626403392] [2022-11-03 02:18:07,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:18:07,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496074297] [2022-11-03 02:18:07,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496074297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:07,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248437118] [2022-11-03 02:18:07,483 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:18:07,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:07,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:07,494 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:07,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:08,567 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:18:08,609 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:10,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [248437118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:10,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:18:10,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 5] total 13 [2022-11-03 02:18:10,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076170950] [2022-11-03 02:18:10,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:10,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:18:10,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:10,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:18:10,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:18:10,099 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 10 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:18:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:10,749 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-03 02:18:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:18:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2022-11-03 02:18:10,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:10,753 INFO L225 Difference]: With dead ends: 35 [2022-11-03 02:18:10,753 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 02:18:10,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:18:10,761 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:10,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 51 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:18:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 02:18:10,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-03 02:18:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:18:10,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-11-03 02:18:10,800 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 20 [2022-11-03 02:18:10,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:10,800 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-11-03 02:18:10,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:18:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-11-03 02:18:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:18:10,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:10,802 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:10,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 02:18:11,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:11,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1396531969, now seen corresponding path program 1 times [2022-11-03 02:18:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:11,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429202909] [2022-11-03 02:18:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:11,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:11,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:18:11,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102125969] [2022-11-03 02:18:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:11,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:11,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:11,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:18:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:18:11,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:18:11,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:18:11,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:11,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429202909] [2022-11-03 02:18:11,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:18:11,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102125969] [2022-11-03 02:18:11,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102125969] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:11,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:18:11,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 02:18:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761669361] [2022-11-03 02:18:11,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:11,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:11,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:11,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:18:11,297 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:18:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:11,404 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-11-03 02:18:11,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:11,405 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2022-11-03 02:18:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:11,409 INFO L225 Difference]: With dead ends: 33 [2022-11-03 02:18:11,410 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:18:11,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:18:11,420 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:11,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:18:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-03 02:18:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:18:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-03 02:18:11,455 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 21 [2022-11-03 02:18:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:11,456 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-03 02:18:11,456 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:18:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-03 02:18:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:18:11,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:11,457 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:11,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:11,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:11,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash -112873217, now seen corresponding path program 1 times [2022-11-03 02:18:11,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:11,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140273921] [2022-11-03 02:18:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:11,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:11,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:18:11,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565953628] [2022-11-03 02:18:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:11,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:11,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:11,712 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:11,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:18:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:11,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:18:11,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:18:11,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:18:12,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:12,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140273921] [2022-11-03 02:18:12,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:18:12,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565953628] [2022-11-03 02:18:12,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565953628] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:12,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:18:12,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 02:18:12,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015373062] [2022-11-03 02:18:12,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:12,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:12,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:18:12,083 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:18:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:12,178 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-11-03 02:18:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:12,179 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2022-11-03 02:18:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:12,181 INFO L225 Difference]: With dead ends: 44 [2022-11-03 02:18:12,181 INFO L226 Difference]: Without dead ends: 42 [2022-11-03 02:18:12,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:18:12,182 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:12,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-03 02:18:12,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-11-03 02:18:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 02:18:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-11-03 02:18:12,213 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 26 [2022-11-03 02:18:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:12,213 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-11-03 02:18:12,214 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), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:18:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-11-03 02:18:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:18:12,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:12,215 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:12,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:12,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:12,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash 665597119, now seen corresponding path program 1 times [2022-11-03 02:18:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:12,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177006975] [2022-11-03 02:18:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:12,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:18:12,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526107970] [2022-11-03 02:18:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:12,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:12,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:12,464 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:12,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:18:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:18:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:18:12,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:18:12,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:12,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177006975] [2022-11-03 02:18:12,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:18:12,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526107970] [2022-11-03 02:18:12,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526107970] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:12,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:18:12,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 02:18:12,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898239379] [2022-11-03 02:18:12,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:12,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:12,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:18:12,934 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:18:13,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:13,071 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-11-03 02:18:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:18:13,071 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 31 [2022-11-03 02:18:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:13,073 INFO L225 Difference]: With dead ends: 48 [2022-11-03 02:18:13,073 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 02:18:13,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:18:13,074 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:13,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 02:18:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-03 02:18:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 02:18:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-03 02:18:13,115 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 31 [2022-11-03 02:18:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:13,116 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-03 02:18:13,116 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:18:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-03 02:18:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:18:13,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:13,119 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:13,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:13,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:13,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:13,343 INFO L85 PathProgramCache]: Analyzing trace with hash -610328385, now seen corresponding path program 1 times [2022-11-03 02:18:13,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:13,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647017418] [2022-11-03 02:18:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:13,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:18:13,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596644089] [2022-11-03 02:18:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:13,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:13,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:13,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:13,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:18:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:18:13,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:18:13,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:14,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647017418] [2022-11-03 02:18:14,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:18:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596644089] [2022-11-03 02:18:14,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596644089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621934801] [2022-11-03 02:18:14,632 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 02:18:14,632 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:14,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:14,633 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:14,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:16,198 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-03 02:18:16,210 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:18:16,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:24,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1621934801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:24,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:18:24,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 18 [2022-11-03 02:18:24,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593921934] [2022-11-03 02:18:24,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:24,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:18:24,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:18:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:18:24,649 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:18:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:25,872 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-11-03 02:18:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:18:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 36 [2022-11-03 02:18:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:25,874 INFO L225 Difference]: With dead ends: 70 [2022-11-03 02:18:25,875 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 02:18:25,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:18:25,876 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:25,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:18:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 02:18:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-03 02:18:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:18:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-03 02:18:25,909 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 36 [2022-11-03 02:18:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:25,909 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-03 02:18:25,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:18:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-03 02:18:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:18:25,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:25,911 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:25,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:26,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:26,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1276270888, now seen corresponding path program 1 times [2022-11-03 02:18:26,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:26,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635750833] [2022-11-03 02:18:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:26,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:18:26,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554587789] [2022-11-03 02:18:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:26,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:26,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:26,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:26,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:18:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:26,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:18:26,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:18:26,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635750833] [2022-11-03 02:18:26,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:18:26,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554587789] [2022-11-03 02:18:26,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554587789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:26,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032737532] [2022-11-03 02:18:26,403 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 02:18:26,403 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:26,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:26,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:26,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:40,111 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-03 02:18:40,123 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:18:40,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:47,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2032737532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:47,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:18:47,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 7] total 20 [2022-11-03 02:18:47,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251525472] [2022-11-03 02:18:47,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:47,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:18:47,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:18:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:18:47,592 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:18:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:50,671 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-11-03 02:18:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:18:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-03 02:18:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:50,674 INFO L225 Difference]: With dead ends: 92 [2022-11-03 02:18:50,674 INFO L226 Difference]: Without dead ends: 84 [2022-11-03 02:18:50,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 99 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:18:50,675 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:50,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:18:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-03 02:18:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-03 02:18:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 02:18:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2022-11-03 02:18:50,705 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 45 [2022-11-03 02:18:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:50,706 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2022-11-03 02:18:50,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:18:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2022-11-03 02:18:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 02:18:50,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:50,708 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:50,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:50,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:50,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1047826176, now seen corresponding path program 1 times [2022-11-03 02:18:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035918175] [2022-11-03 02:18:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:50,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:50,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:18:50,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765180472] [2022-11-03 02:18:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:50,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:50,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:50,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:50,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:18:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:51,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:18:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:18:51,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:18:51,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035918175] [2022-11-03 02:18:51,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:18:51,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765180472] [2022-11-03 02:18:51,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765180472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:51,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039778201] [2022-11-03 02:18:51,281 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 02:18:51,282 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:18:51,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:18:51,282 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:18:51,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:58,661 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2022-11-03 02:18:58,736 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:18:58,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:05,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2501#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:05,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:05,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:19:05,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-03 02:19:05,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478753661] [2022-11-03 02:19:05,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:05,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:19:05,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:19:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:19:05,351 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:19:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:05,628 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2022-11-03 02:19:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:19:05,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 58 [2022-11-03 02:19:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:05,632 INFO L225 Difference]: With dead ends: 95 [2022-11-03 02:19:05,632 INFO L226 Difference]: Without dead ends: 93 [2022-11-03 02:19:05,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:19:05,634 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:05,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:19:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-03 02:19:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-03 02:19:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 56 states have internal predecessors, (60), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-03 02:19:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2022-11-03 02:19:05,672 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 58 [2022-11-03 02:19:05,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:05,673 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2022-11-03 02:19:05,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:19:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2022-11-03 02:19:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:19:05,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:05,675 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:05,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:05,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:19:05,901 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:05,901 INFO L85 PathProgramCache]: Analyzing trace with hash -568433657, now seen corresponding path program 1 times [2022-11-03 02:19:05,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:05,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025380922] [2022-11-03 02:19:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:05,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:05,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:19:05,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427564822] [2022-11-03 02:19:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:05,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:05,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:05,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:19:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:06,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:19:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-03 02:19:06,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-03 02:19:06,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:06,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025380922] [2022-11-03 02:19:06,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:19:06,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427564822] [2022-11-03 02:19:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427564822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200272674] [2022-11-03 02:19:06,845 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 02:19:06,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:06,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:06,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:06,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:20,903 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2022-11-03 02:19:20,933 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:19:20,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:28,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3210#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:28,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:28,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:19:28,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-11-03 02:19:28,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976279594] [2022-11-03 02:19:28,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:28,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:19:28,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:19:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:19:28,613 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-03 02:19:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:33,352 INFO L93 Difference]: Finished difference Result 163 states and 219 transitions. [2022-11-03 02:19:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:19:33,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 67 [2022-11-03 02:19:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:33,356 INFO L225 Difference]: With dead ends: 163 [2022-11-03 02:19:33,357 INFO L226 Difference]: Without dead ends: 161 [2022-11-03 02:19:33,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 158 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:19:33,359 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 55 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:33,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 260 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 02:19:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-03 02:19:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2022-11-03 02:19:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 83 states have internal predecessors, (97), 55 states have call successors, (55), 14 states have call predecessors, (55), 14 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-03 02:19:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 206 transitions. [2022-11-03 02:19:33,481 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 206 transitions. Word has length 67 [2022-11-03 02:19:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:33,481 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 206 transitions. [2022-11-03 02:19:33,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-03 02:19:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 206 transitions. [2022-11-03 02:19:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:19:33,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:33,495 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:33,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:33,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:33,696 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash 189361655, now seen corresponding path program 1 times [2022-11-03 02:19:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:33,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404315458] [2022-11-03 02:19:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:33,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:33,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:19:33,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311949781] [2022-11-03 02:19:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:33,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:33,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:33,731 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:33,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:19:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:19:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 37 proven. 9 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-03 02:19:34,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-03 02:19:34,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404315458] [2022-11-03 02:19:34,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:19:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311949781] [2022-11-03 02:19:34,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311949781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167446725] [2022-11-03 02:19:34,157 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:19:34,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:34,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:34,158 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:34,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:48,794 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2022-11-03 02:19:48,823 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:19:48,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:54,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4188#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:54,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:54,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:19:54,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-03 02:19:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376066739] [2022-11-03 02:19:54,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:54,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:19:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:19:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:19:54,069 INFO L87 Difference]: Start difference. First operand 151 states and 206 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-03 02:19:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:54,896 INFO L93 Difference]: Finished difference Result 204 states and 280 transitions. [2022-11-03 02:19:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:19:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 72 [2022-11-03 02:19:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:54,900 INFO L225 Difference]: With dead ends: 204 [2022-11-03 02:19:54,901 INFO L226 Difference]: Without dead ends: 198 [2022-11-03 02:19:54,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 176 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:19:54,903 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:54,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 120 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:19:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-03 02:19:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 161. [2022-11-03 02:19:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 91 states have internal predecessors, (104), 53 states have call successors, (53), 17 states have call predecessors, (53), 17 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-11-03 02:19:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2022-11-03 02:19:54,986 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 72 [2022-11-03 02:19:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:54,987 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2022-11-03 02:19:54,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-03 02:19:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2022-11-03 02:19:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:19:54,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:54,989 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:55,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:55,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:55,201 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash -581231213, now seen corresponding path program 1 times [2022-11-03 02:19:55,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:55,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442624053] [2022-11-03 02:19:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:55,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:55,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:19:55,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081261141] [2022-11-03 02:19:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:55,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:55,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:55,214 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:55,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:19:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:19:55,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 50 proven. 44 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-03 02:19:56,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 50 proven. 44 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-03 02:20:05,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:05,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442624053] [2022-11-03 02:20:05,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:20:05,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081261141] [2022-11-03 02:20:05,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081261141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:05,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1005765014] [2022-11-03 02:20:05,604 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 02:20:05,604 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:20:05,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:20:05,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:20:05,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:20:21,277 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2022-11-03 02:20:21,308 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:20:21,324 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:20:39,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5297#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:20:39,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:20:39,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:20:39,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-11-03 02:20:39,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750064232] [2022-11-03 02:20:39,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:39,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:20:39,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:20:39,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1011, Unknown=2, NotChecked=0, Total=1190 [2022-11-03 02:20:39,269 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-03 02:20:53,418 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 02:21:01,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:21:03,372 WARN L539 Checker$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 02:21:05,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:21:07,381 WARN L539 Checker$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 02:21:10,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:21:12,849 WARN L539 Checker$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 02:21:14,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:21:16,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:21:23,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:21:24,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:21:27,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:21:30,003 WARN L539 Checker$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 02:21:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:30,252 INFO L93 Difference]: Finished difference Result 227 states and 303 transitions. [2022-11-03 02:21:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:21:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) Word has length 83 [2022-11-03 02:21:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:30,255 INFO L225 Difference]: With dead ends: 227 [2022-11-03 02:21:30,256 INFO L226 Difference]: Without dead ends: 225 [2022-11-03 02:21:30,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 199 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=311, Invalid=1664, Unknown=5, NotChecked=0, Total=1980 [2022-11-03 02:21:30,258 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 62 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 123 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:30,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 139 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 691 Invalid, 9 Unknown, 0 Unchecked, 30.6s Time] [2022-11-03 02:21:30,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-03 02:21:30,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 221. [2022-11-03 02:21:30,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 127 states have internal predecessors, (144), 77 states have call successors, (77), 19 states have call predecessors, (77), 19 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2022-11-03 02:21:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 297 transitions. [2022-11-03 02:21:30,383 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 297 transitions. Word has length 83 [2022-11-03 02:21:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:30,384 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 297 transitions. [2022-11-03 02:21:30,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 14 states have internal predecessors, (35), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-03 02:21:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 297 transitions. [2022-11-03 02:21:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 02:21:30,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:30,387 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:30,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:30,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:21:30,597 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:30,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1528591660, now seen corresponding path program 2 times [2022-11-03 02:21:30,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:30,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53653433] [2022-11-03 02:21:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:30,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:30,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:21:30,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436805387] [2022-11-03 02:21:30,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:30,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:30,611 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:30,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:21:30,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:21:30,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:21:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-03 02:21:30,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:21:30,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:30,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53653433] [2022-11-03 02:21:30,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:21:30,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436805387] [2022-11-03 02:21:30,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436805387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:21:30,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:21:30,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:21:30,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57913327] [2022-11-03 02:21:30,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:21:30,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:21:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:21:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:21:30,727 INFO L87 Difference]: Start difference. First operand 221 states and 297 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:21:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:30,980 INFO L93 Difference]: Finished difference Result 318 states and 422 transitions. [2022-11-03 02:21:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:21:30,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2022-11-03 02:21:30,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:30,982 INFO L225 Difference]: With dead ends: 318 [2022-11-03 02:21:30,983 INFO L226 Difference]: Without dead ends: 206 [2022-11-03 02:21:30,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:21:30,984 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:30,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 108 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:21:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-03 02:21:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2022-11-03 02:21:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 114 states have (on average 1.131578947368421) internal successors, (129), 117 states have internal predecessors, (129), 69 states have call successors, (69), 19 states have call predecessors, (69), 19 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2022-11-03 02:21:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 266 transitions. [2022-11-03 02:21:31,123 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 266 transitions. Word has length 92 [2022-11-03 02:21:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:31,124 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 266 transitions. [2022-11-03 02:21:31,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:21:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 266 transitions. [2022-11-03 02:21:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 02:21:31,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:31,127 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:21:31,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:31,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:21:31,341 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash -990146452, now seen corresponding path program 2 times [2022-11-03 02:21:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:31,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664770202] [2022-11-03 02:21:31,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:31,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:31,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:21:31,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383019315] [2022-11-03 02:21:31,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:31,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:31,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:31,355 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:31,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:21:31,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:21:31,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:31,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:21:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-03 02:21:33,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-03 02:21:38,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:38,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664770202] [2022-11-03 02:21:38,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:21:38,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383019315] [2022-11-03 02:21:38,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383019315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:38,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54593158] [2022-11-03 02:21:38,839 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 02:21:38,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:38,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:38,842 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:38,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:49,467 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2022-11-03 02:21:49,492 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:21:49,504 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:58,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7742#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 02:21:58,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:58,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:21:58,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-11-03 02:21:58,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749311482] [2022-11-03 02:21:58,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:21:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:21:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1347, Unknown=1, NotChecked=0, Total=1560 [2022-11-03 02:21:58,882 INFO L87 Difference]: Start difference. First operand 203 states and 266 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 20 states have internal predecessors, (39), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 13 states have call successors, (34) [2022-11-03 02:22:01,398 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse1 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse2 (+ .cse10 .cse11 .cse1)) (.cse3 (* 3 |c_ULTIMATE.start_main_~b~0#1|)) (.cse6 (<= .cse1 |c_ULTIMATE.start_main_~c~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~c~0#1| (- 1))) (.cse9 (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|))) (and (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~b~0#1|) (or (= (let ((.cse0 (div .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse0 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse0 |c_ULTIMATE.start_main_~s~0#1|))) .cse2) (<= .cse3 |c_ULTIMATE.start_main_~a~0#1|) (not (<= .cse1 |c_ULTIMATE.start_main_~a~0#1|)) (= |c_ULTIMATE.start_main_~a~0#1| .cse1)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1| .cse7 .cse1))) (let ((.cse5 (div .cse4 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| .cse1) (not (= (mod .cse4 |c_ULTIMATE.start_main_~b~0#1|) 0)) (not (<= (+ 2 |c_ULTIMATE.start_main_~k~0#1|) .cse5)) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse5 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse5 |c_ULTIMATE.start_main_~s~0#1|)) .cse2) (<= .cse3 |c_ULTIMATE.start_main_~c~0#1|) (not .cse6)))) (let ((.cse12 (+ |c_ULTIMATE.start_main_~a~0#1| .cse7 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse8 (div .cse12 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse8)) .cse6 (not .cse9) (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse8 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse8 |c_ULTIMATE.start_main_~q~0#1|)) (+ .cse10 .cse11 |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse12 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (or (= |c_ULTIMATE.start_main_~c~0#1| 0) .cse9 (= (+ .cse10 .cse11) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))))) is different from true [2022-11-03 02:22:06,349 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 02:22:08,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:22:10,356 WARN L539 Checker$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 02:22:12,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:22:14,364 WARN L539 Checker$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 02:23:04,159 WARN L234 SmtUtils]: Spent 49.42s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:23:06,981 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 02:23:10,505 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse5 (<= .cse0 |c_ULTIMATE.start_main_~c~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~c~0#1| (- 1))) (.cse8 (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (and (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1| .cse6 .cse0))) (let ((.cse2 (div .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| .cse0) (not (= (mod .cse1 |c_ULTIMATE.start_main_~b~0#1|) 0)) (not (<= (+ 2 |c_ULTIMATE.start_main_~k~0#1|) .cse2)) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse2 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse2 |c_ULTIMATE.start_main_~s~0#1|)) (+ .cse3 .cse4 .cse0)) (<= (* 3 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (not .cse5)))) (let ((.cse9 (+ |c_ULTIMATE.start_main_~a~0#1| .cse6 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse7 (div .cse9 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse7)) .cse5 (not .cse8) (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse7 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse7 |c_ULTIMATE.start_main_~q~0#1|)) (+ .cse3 .cse4 |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse9 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (or (= |c_ULTIMATE.start_main_~c~0#1| 0) .cse8 (= (+ .cse3 .cse4) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))))) is different from true [2022-11-03 02:23:12,582 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (and (or (= |c_ULTIMATE.start_main_~c~0#1| 0) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~k~0#1|)) |c_ULTIMATE.start_main_~a~0#1|)) .cse0 (= (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~c~0#1| (- 1)) |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse3 (div .cse4 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse3)) (<= (* 2 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (not .cse0) (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse3 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse3 |c_ULTIMATE.start_main_~q~0#1|)) (+ .cse1 .cse2 |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse4 |c_ULTIMATE.start_main_~b~0#1|) 0))))))) is different from true [2022-11-03 02:23:15,080 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse5 (<= .cse0 |c_ULTIMATE.start_main_~c~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~c~0#1| (- 1))) (.cse8 (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (and (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~b~0#1|) (= |c_ULTIMATE.start_main_~b~0#1| 0)) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1| .cse6 .cse0))) (let ((.cse2 (div .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| .cse0) (not (= (mod .cse1 |c_ULTIMATE.start_main_~b~0#1|) 0)) (not (<= (+ 2 |c_ULTIMATE.start_main_~k~0#1|) .cse2)) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse2 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse2 |c_ULTIMATE.start_main_~s~0#1|)) (+ .cse3 .cse4 .cse0)) (<= (* 3 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (not .cse5)))) (let ((.cse9 (+ |c_ULTIMATE.start_main_~a~0#1| .cse6 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse7 (div .cse9 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse7)) .cse5 (not .cse8) (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse7 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse7 |c_ULTIMATE.start_main_~q~0#1|)) (+ .cse3 .cse4 |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse9 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (or (= |c_ULTIMATE.start_main_~c~0#1| 0) .cse8 (= (+ .cse3 .cse4) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))))) is different from true [2022-11-03 02:23:17,509 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse11 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse2 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse3 (+ .cse11 .cse12 .cse2)) (.cse4 (* 3 |c_ULTIMATE.start_main_~b~0#1|)) (.cse7 (<= .cse2 |c_ULTIMATE.start_main_~c~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~c~0#1| (- 1))) (.cse10 (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (and (= 1 |c_ULTIMATE.start_main_~q~0#1|) (= (+ |c_ULTIMATE.start_main_~x~0#1| .cse0) |c_ULTIMATE.start_main_~b~0#1|) (not (<= |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (or (= (let ((.cse1 (div .cse2 |c_ULTIMATE.start_main_~b~0#1|))) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse1 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse1 |c_ULTIMATE.start_main_~s~0#1|))) .cse3) (<= .cse4 |c_ULTIMATE.start_main_~a~0#1|) (not (<= .cse2 |c_ULTIMATE.start_main_~a~0#1|)) (= |c_ULTIMATE.start_main_~a~0#1| .cse2)) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1| .cse8 .cse2))) (let ((.cse6 (div .cse5 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| .cse2) (not (= (mod .cse5 |c_ULTIMATE.start_main_~b~0#1|) 0)) (not (<= (+ 2 |c_ULTIMATE.start_main_~k~0#1|) .cse6)) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse6 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse6 |c_ULTIMATE.start_main_~s~0#1|)) .cse3) (<= .cse4 |c_ULTIMATE.start_main_~c~0#1|) (not .cse7)))) (<= 0 |c_ULTIMATE.start_main_~b~0#1|) (let ((.cse13 (+ |c_ULTIMATE.start_main_~a~0#1| .cse8 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse9 (div .cse13 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse9)) .cse7 (not .cse10) (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse9 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse9 |c_ULTIMATE.start_main_~q~0#1|)) (+ .cse11 .cse12 |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse13 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~a~0#1|) (or (= |c_ULTIMATE.start_main_~c~0#1| 0) .cse10 (= (+ .cse11 .cse12) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (= (+ (* |c_ULTIMATE.start_main_~a~0#1| 2) .cse0) 0)))) is different from true [2022-11-03 02:23:31,931 WARN L234 SmtUtils]: Spent 12.27s on a formula simplification. DAG size of input: 78 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:23:34,357 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 02:23:36,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:23:40,846 WARN L539 Checker$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 02:24:36,194 WARN L234 SmtUtils]: Spent 53.70s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:24:39,050 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 02:24:41,067 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse5 (<= .cse2 |c_ULTIMATE.start_main_~c~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~c~0#1| (- 1)))) (and (or (= |c_ULTIMATE.start_main_~c~0#1| 0) (= (+ .cse0 .cse1) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~b~0#1|) (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1| .cse6 .cse2))) (let ((.cse4 (div .cse3 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| .cse2) (not (= (mod .cse3 |c_ULTIMATE.start_main_~b~0#1|) 0)) (not (<= (+ 2 |c_ULTIMATE.start_main_~k~0#1|) .cse4)) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse4 |c_ULTIMATE.start_main_~s~0#1|)) (+ .cse0 .cse1 .cse2)) (<= (* 3 |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~c~0#1|) (not .cse5)))) (let ((.cse8 (+ |c_ULTIMATE.start_main_~a~0#1| .cse6 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse7 (div .cse8 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse7)) .cse5 (not (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse7 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse7 |c_ULTIMATE.start_main_~q~0#1|)) (+ .cse0 .cse1 |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse8 |c_ULTIMATE.start_main_~b~0#1|) 0)))))))) is different from true [2022-11-03 02:24:43,074 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 02:24:45,079 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 02:25:37,551 WARN L234 SmtUtils]: Spent 50.19s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:25:41,280 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse1 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse2 (+ .cse10 .cse11 .cse1)) (.cse3 (* 3 |c_ULTIMATE.start_main_~b~0#1|)) (.cse6 (<= .cse1 |c_ULTIMATE.start_main_~c~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~c~0#1| (- 1))) (.cse9 (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|))) (and (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) |c_ULTIMATE.start_main_~b~0#1|) (= |c_ULTIMATE.start_main_~b~0#1| 0)) (or (= (let ((.cse0 (div .cse1 |c_ULTIMATE.start_main_~b~0#1|))) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse0 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse0 |c_ULTIMATE.start_main_~s~0#1|))) .cse2) (<= .cse3 |c_ULTIMATE.start_main_~a~0#1|) (not (<= .cse1 |c_ULTIMATE.start_main_~a~0#1|)) (= |c_ULTIMATE.start_main_~a~0#1| .cse1)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1| .cse7 .cse1))) (let ((.cse5 (div .cse4 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| .cse1) (not (= (mod .cse4 |c_ULTIMATE.start_main_~b~0#1|) 0)) (not (<= (+ 2 |c_ULTIMATE.start_main_~k~0#1|) .cse5)) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse5 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse5 |c_ULTIMATE.start_main_~s~0#1|)) .cse2) (<= .cse3 |c_ULTIMATE.start_main_~c~0#1|) (not .cse6)))) (let ((.cse12 (+ |c_ULTIMATE.start_main_~a~0#1| .cse7 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse8 (div .cse12 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse8)) .cse6 (not .cse9) (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse8 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse8 |c_ULTIMATE.start_main_~q~0#1|)) (+ .cse10 .cse11 |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse12 |c_ULTIMATE.start_main_~b~0#1|) 0))))) (or (= |c_ULTIMATE.start_main_~c~0#1| 0) .cse9 (= (+ .cse10 .cse11) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|))))))) is different from true [2022-11-03 02:25:43,804 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 02:26:02,643 WARN L234 SmtUtils]: Spent 17.69s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:26:05,046 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 02:26:12,278 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse4 (* 2 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse5 (+ .cse1 .cse2 .cse4)) (.cse6 (* 3 |c_ULTIMATE.start_main_~b~0#1|)) (.cse9 (<= .cse4 |c_ULTIMATE.start_main_~c~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~c~0#1| (- 1)))) (and (not (= |c_ULTIMATE.start_main_~b~0#1| 0)) (= (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2)) 0) (= 1 |c_ULTIMATE.start_main_~q~0#1|) (= |c_ULTIMATE.start_main_~b~0#1| (+ .cse0 |c_ULTIMATE.start_main_~x~0#1|)) (not (<= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (or (= |c_ULTIMATE.start_main_~c~0#1| 0) (= (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)))) (or (= (let ((.cse3 (div .cse4 |c_ULTIMATE.start_main_~b~0#1|))) (+ |c_ULTIMATE.start_main_~a~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse3 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse3 |c_ULTIMATE.start_main_~s~0#1|))) .cse5) (<= .cse6 |c_ULTIMATE.start_main_~a~0#1|) (not (<= .cse4 |c_ULTIMATE.start_main_~a~0#1|)) (= |c_ULTIMATE.start_main_~a~0#1| .cse4)) (let ((.cse7 (+ |c_ULTIMATE.start_main_~a~0#1| .cse10 .cse4))) (let ((.cse8 (div .cse7 |c_ULTIMATE.start_main_~b~0#1|))) (or (= |c_ULTIMATE.start_main_~c~0#1| .cse4) (not (= (mod .cse7 |c_ULTIMATE.start_main_~b~0#1|) 0)) (not (<= (+ 2 |c_ULTIMATE.start_main_~k~0#1|) .cse8)) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~x~0#1| .cse8 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| .cse8 |c_ULTIMATE.start_main_~s~0#1|)) .cse5) (<= .cse6 |c_ULTIMATE.start_main_~c~0#1|) (not .cse9)))) (<= 0 |c_ULTIMATE.start_main_~b~0#1|) (let ((.cse12 (+ |c_ULTIMATE.start_main_~a~0#1| .cse10 |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse11 (div .cse12 |c_ULTIMATE.start_main_~b~0#1|))) (or (not (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) .cse11)) .cse9 (not (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (= |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| .cse11 |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| .cse11 |c_ULTIMATE.start_main_~q~0#1|)) (+ .cse1 .cse2 |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse12 |c_ULTIMATE.start_main_~b~0#1|) 0)))))))) is different from true [2022-11-03 02:26:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:12,306 INFO L93 Difference]: Finished difference Result 278 states and 369 transitions. [2022-11-03 02:26:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:26:12,307 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 20 states have internal predecessors, (39), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 13 states have call successors, (34) Word has length 100 [2022-11-03 02:26:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:12,309 INFO L225 Difference]: With dead ends: 278 [2022-11-03 02:26:12,309 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 02:26:12,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 244 SyntacticMatches, 17 SemanticMatches, 68 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 228.6s TimeCoverageRelationStatistics Valid=563, Invalid=3241, Unknown=10, NotChecked=1016, Total=4830 [2022-11-03 02:26:12,311 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 70 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 202 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 38.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:12,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 176 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 706 Invalid, 14 Unknown, 46 Unchecked, 38.9s Time] [2022-11-03 02:26:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 02:26:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 258. [2022-11-03 02:26:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 141 states have (on average 1.1418439716312057) internal successors, (161), 144 states have internal predecessors, (161), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-03 02:26:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 346 transitions. [2022-11-03 02:26:12,564 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 346 transitions. Word has length 100 [2022-11-03 02:26:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:12,564 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 346 transitions. [2022-11-03 02:26:12,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 20 states have internal predecessors, (39), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 13 states have call successors, (34) [2022-11-03 02:26:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 346 transitions. [2022-11-03 02:26:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:26:12,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:12,566 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:12,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:12,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:12,767 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash -130323247, now seen corresponding path program 3 times [2022-11-03 02:26:12,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:12,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764876119] [2022-11-03 02:26:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:12,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:12,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:26:12,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963477863] [2022-11-03 02:26:12,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:26:12,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:12,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:12,777 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:12,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:26:12,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:26:12,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:26:12,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:26:12,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 172 proven. 47 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2022-11-03 02:26:14,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:43,803 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_688| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_642| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_682| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|)) (.cse1 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|)) (.cse2 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842|))) (let ((.cse3 (+ .cse0 .cse1 .cse2)) (.cse4 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655|) (* (- 1) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796|) .cse0 .cse1 .cse2) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754|) 0) (= .cse3 (+ .cse4 |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796|)) (not (= .cse3 (+ .cse4 |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_642|)))) (= (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744|) (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744|)) (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_688| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_682|))))))))) is different from true [2022-11-03 02:27:28,179 WARN L234 SmtUtils]: Spent 14.03s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:27:42,253 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_688| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_642| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_682| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|)) (.cse1 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|)) (.cse2 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842|))) (let ((.cse3 (+ .cse0 .cse1 .cse2)) (.cse4 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655|) (* (- 1) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796|) .cse0 .cse1 .cse2) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754|) 0) (= .cse3 (+ .cse4 |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796|)) (not (= .cse3 (+ .cse4 |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_642|)))) (= (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744|) (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744|)) (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_688| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_682|)))))))) is different from true [2022-11-03 02:27:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 206 proven. 4 refuted. 0 times theorem prover too weak. 350 trivial. 7 not checked. [2022-11-03 02:27:47,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:47,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764876119] [2022-11-03 02:27:47,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:47,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963477863] [2022-11-03 02:27:47,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963477863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:47,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043951957] [2022-11-03 02:27:47,773 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 02:27:47,773 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:47,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:47,774 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:47,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:01,933 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2022-11-03 02:28:01,996 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:28:02,010 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:20,753 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9367#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:28:20,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:28:20,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:28:20,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-11-03 02:28:20,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264601078] [2022-11-03 02:28:20,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:20,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:28:20,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:20,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:28:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1672, Unknown=8, NotChecked=170, Total=2070 [2022-11-03 02:28:20,756 INFO L87 Difference]: Start difference. First operand 258 states and 346 transitions. Second operand has 28 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 13 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-03 02:29:00,189 WARN L234 SmtUtils]: Spent 26.06s on a formula simplification. DAG size of input: 50 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:29:02,195 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_688| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_642| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_682| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|)) (.cse1 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|)) (.cse2 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842|))) (let ((.cse3 (+ .cse0 .cse1 .cse2)) (.cse4 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655|))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_655|) (* (- 1) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796|) .cse0 .cse1 .cse2) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754|) 0) (= .cse3 (+ .cse4 |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796|)) (not (= .cse3 (+ .cse4 |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_796| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_642|)))) (= (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_754| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744|) (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_752| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_744|)) (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_688| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_856|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_842| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_682|))))))))) is different from true [2022-11-03 02:29:21,098 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:29:49,233 WARN L234 SmtUtils]: Spent 26.06s on a formula simplification. DAG size of input: 52 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:29:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:54,913 INFO L93 Difference]: Finished difference Result 308 states and 408 transitions. [2022-11-03 02:29:54,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:29:54,914 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 13 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 11 states have call successors, (30) Word has length 114 [2022-11-03 02:29:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:54,916 INFO L225 Difference]: With dead ends: 308 [2022-11-03 02:29:54,916 INFO L226 Difference]: Without dead ends: 300 [2022-11-03 02:29:54,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 274 SyntacticMatches, 24 SemanticMatches, 59 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 137.6s TimeCoverageRelationStatistics Valid=368, Invalid=2932, Unknown=18, NotChecked=342, Total=3660 [2022-11-03 02:29:54,918 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 43 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:54,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 269 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 839 Invalid, 0 Unknown, 278 Unchecked, 4.7s Time] [2022-11-03 02:29:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-03 02:29:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 244. [2022-11-03 02:29:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 140 states have internal predecessors, (151), 79 states have call successors, (79), 26 states have call predecessors, (79), 26 states have return successors, (79), 77 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-03 02:29:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 309 transitions. [2022-11-03 02:29:55,110 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 309 transitions. Word has length 114 [2022-11-03 02:29:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:55,110 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 309 transitions. [2022-11-03 02:29:55,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 13 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-03 02:29:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 309 transitions. [2022-11-03 02:29:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:29:55,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:55,113 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:55,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-03 02:29:55,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:29:55,321 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 978353012, now seen corresponding path program 3 times [2022-11-03 02:29:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:55,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347215689] [2022-11-03 02:29:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:55,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:55,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:29:55,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970938186] [2022-11-03 02:29:55,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:29:55,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:55,342 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:55,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:29:55,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:29:55,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:29:55,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:29:55,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:56,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:56,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347215689] [2022-11-03 02:29:56,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:29:56,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970938186] [2022-11-03 02:29:56,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Div with more than two parameters [2022-11-03 02:29:56,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529427208] [2022-11-03 02:29:56,795 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 02:29:56,795 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:56,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:56,796 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:56,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:23,238 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 53 for LOIs [2022-11-03 02:30:23,297 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2022-11-03 02:30:23,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:32,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10699#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:30:32,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:32,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:32,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-03 02:30:32,472 ERROR L170 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2022-11-03 02:30:32,472 INFO L359 BasicCegarLoop]: Counterexample might be feasible [2022-11-03 02:30:32,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:30:32,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:32,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:30:32,700 INFO L444 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:32,703 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:30:32,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:30:32 BoogieIcfgContainer [2022-11-03 02:30:32,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:30:32,743 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:30:32,743 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:30:32,743 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:30:32,744 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:18:06" (3/4) ... [2022-11-03 02:30:32,747 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:30:32,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:30:32,748 INFO L158 Benchmark]: Toolchain (without parser) took 747608.36ms. Allocated memory was 109.1MB in the beginning and 627.0MB in the end (delta: 518.0MB). Free memory was 70.9MB in the beginning and 284.6MB in the end (delta: -213.6MB). Peak memory consumption was 304.3MB. Max. memory is 16.1GB. [2022-11-03 02:30:32,750 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory is still 87.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:30:32,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.26ms. Allocated memory is still 109.1MB. Free memory was 70.7MB in the beginning and 85.5MB in the end (delta: -14.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:30:32,750 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.65ms. Allocated memory is still 109.1MB. Free memory was 85.5MB in the beginning and 83.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:30:32,754 INFO L158 Benchmark]: Boogie Preprocessor took 49.05ms. Allocated memory is still 109.1MB. Free memory was 83.9MB in the beginning and 82.6MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:30:32,754 INFO L158 Benchmark]: RCFGBuilder took 433.72ms. Allocated memory is still 109.1MB. Free memory was 82.6MB in the beginning and 70.1MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:30:32,755 INFO L158 Benchmark]: TraceAbstraction took 746722.40ms. Allocated memory was 109.1MB in the beginning and 627.0MB in the end (delta: 518.0MB). Free memory was 69.3MB in the beginning and 284.6MB in the end (delta: -215.3MB). Peak memory consumption was 304.7MB. Max. memory is 16.1GB. [2022-11-03 02:30:32,756 INFO L158 Benchmark]: Witness Printer took 4.24ms. Allocated memory is still 627.0MB. Free memory is still 284.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:30:32,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory is still 87.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.26ms. Allocated memory is still 109.1MB. Free memory was 70.7MB in the beginning and 85.5MB in the end (delta: -14.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.65ms. Allocated memory is still 109.1MB. Free memory was 85.5MB in the beginning and 83.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 49.05ms. Allocated memory is still 109.1MB. Free memory was 83.9MB in the beginning and 82.6MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 433.72ms. Allocated memory is still 109.1MB. Free memory was 82.6MB in the beginning and 70.1MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 746722.40ms. Allocated memory was 109.1MB in the beginning and 627.0MB in the end (delta: 518.0MB). Free memory was 69.3MB in the beginning and 284.6MB in the end (delta: -215.3MB). Peak memory consumption was 304.7MB. Max. memory is 16.1GB. * Witness Printer took 4.24ms. Allocated memory is still 627.0MB. Free memory is still 284.6MB. There was no memory consumed. 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 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s, c, k, xy, yy; [L21] x = __VERIFIER_nondet_int() [L22] y = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L23] RET assume_abort_if_not(x >= 1) [L24] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y >= 1) [L26] a = x [L27] b = y [L28] p = 1 [L29] q = 0 [L30] r = 0 [L31] s = 1 [L32] c = 0 [L33] k = 0 [L34] xy = (long long) x * y [L35] yy = (long long) y * y [L36] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L36] RET assume_abort_if_not(xy < 2147483647) [L37] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L37] RET assume_abort_if_not(yy < 2147483647) [L39] COND TRUE 1 [L40] COND FALSE !(!(b != 0)) [L42] c = a [L43] k = 0 [L45] COND TRUE 1 [L46] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(a == k * b + c) [L47] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == y*r + x*p) [L48] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(b == x * q + y * s) [L49] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND TRUE !(c >= b) [L56] a = b [L57] b = c [L59] long long temp; [L60] temp = p [L61] p = q [L62] q = temp - q * k [L63] temp = r [L64] r = s [L65] s = temp - s * k [L39] COND TRUE 1 [L40] COND FALSE !(!(b != 0)) [L42] c = a [L43] k = 0 [L45] COND TRUE 1 [L46] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(a == k * b + c) [L47] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == y*r + x*p) [L48] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(b == x * q + y * s) [L49] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND FALSE !(!(c >= b)) [L52] c = c - b [L53] k = k + 1 [L45] COND TRUE 1 [L46] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(a == k * b + c) [L47] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == y*r + x*p) [L48] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(b == x * q + y * s) [L49] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND TRUE !(c >= b) [L56] a = b [L57] b = c [L59] long long temp; [L60] temp = p [L61] p = q [L62] q = temp - q * k [L63] temp = r [L64] r = s [L65] s = temp - s * k [L39] COND TRUE 1 [L40] COND FALSE !(!(b != 0)) [L42] c = a [L43] k = 0 [L45] COND TRUE 1 [L46] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(a == k * b + c) [L47] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == y*r + x*p) [L48] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(b == x * q + y * s) [L49] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND FALSE !(!(c >= b)) [L52] c = c - b [L53] k = k + 1 [L45] COND TRUE 1 [L46] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(a == k * b + c) [L47] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == y*r + x*p) [L48] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(b == x * q + y * s) [L49] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L50] COND TRUE !(c >= b) [L56] a = b [L57] b = c [L59] long long temp; [L60] temp = p [L61] p = q [L62] q = temp - q * k [L63] temp = r [L64] r = s [L65] s = temp - s * k [L39] COND TRUE 1 [L40] COND FALSE !(!(b != 0)) [L42] c = a [L43] k = 0 [L45] COND TRUE 1 [L46] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(a == k * b + c) [L47] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == y*r + x*p) [L48] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(b == x * q + y * s) [L49] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 746.6s, OverallIterations: 15, TraceHistogramMax: 24, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 410.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 mSolverCounterUnknown, 463 SdHoareTripleChecker+Valid, 82.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 391 mSDsluCounter, 1608 SdHoareTripleChecker+Invalid, 81.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 324 IncrementalHoareTripleChecker+Unchecked, 1255 mSDsCounter, 697 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4155 IncrementalHoareTripleChecker+Invalid, 5199 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 697 mSolverCounterUnsat, 456 mSDtfsCounter, 4155 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2086 GetRequests, 1612 SyntacticMatches, 123 SemanticMatches, 351 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 6269 ImplicationChecksByTransitivity, 450.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=258occurred in iteration=13, InterpolantAutomatonStates: 193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 132 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 117.9s InterpolantComputationTime, 939 NumberOfCodeBlocks, 852 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1396 ConstructedInterpolants, 4 QuantifiedInterpolants, 9387 SizeOfPredicates, 64 NumberOfNonLiveVariables, 2506 ConjunctsInSsa, 388 ConjunctsInUnsatCore, 25 InterpolantComputations, 5 PerfectInterpolantSequences, 3699/4015 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: OVERALL_TIME: 16.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 82, DAG_INTERPRETER_EARLY_EXITS: 4, TOOLS_POST_APPLICATIONS: 47, TOOLS_POST_TIME: 1.0s, TOOLS_POST_CALL_APPLICATIONS: 74, TOOLS_POST_CALL_TIME: 11.4s, TOOLS_POST_RETURN_APPLICATIONS: 54, TOOLS_POST_RETURN_TIME: 1.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 175, TOOLS_QUANTIFIERELIM_TIME: 13.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.6s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 194, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 90, DOMAIN_JOIN_TIME: 1.7s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 82, DOMAIN_ISBOTTOM_TIME: 1.1s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 6.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 6.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 54, CALL_SUMMARIZER_CACHE_MISSES: 5, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 879, DAG_COMPRESSION_RETAINED_NODES: 194, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:30:32,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- 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 02:30:35,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:30:35,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:30:35,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:30:35,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:30:35,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:30:35,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:30:35,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:30:35,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:30:35,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:30:35,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:30:35,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:30:35,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:30:35,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:30:35,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:30:35,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:30:35,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:30:35,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:30:35,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:30:35,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:30:35,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:30:35,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:30:35,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:30:35,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:30:35,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:30:35,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:30:35,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:30:35,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:30:35,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:30:35,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:30:35,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:30:35,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:30:35,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:30:35,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:30:35,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:30:35,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:30:35,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:30:35,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:30:35,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:30:35,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:30:35,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:30:35,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:30:35,486 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:30:35,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:30:35,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:30:35,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:30:35,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:30:35,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:30:35,495 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:30:35,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:30:35,495 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:30:35,496 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:30:35,497 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:30:35,497 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:30:35,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:30:35,499 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:30:35,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:30:35,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:30:35,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:30:35,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:30:35,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:30:35,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:30:35,501 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:30:35,501 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:30:35,502 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:30:35,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:30:35,502 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:30:35,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:30:35,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:30:35,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:30:35,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:30:35,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:35,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:30:35,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:30:35,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:30:35,505 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:30:35,505 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:35,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:30:35,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:30:35,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:30:35,507 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2022-11-03 02:30:35,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:30:35,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:30:35,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:30:35,960 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:30:35,961 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:30:35,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-11-03 02:30:36,041 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data/96caa49d7/d9be43bd2e814f9ebcb43c847382d036/FLAG1f4e13659 [2022-11-03 02:30:36,545 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:30:36,545 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-11-03 02:30:36,554 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data/96caa49d7/d9be43bd2e814f9ebcb43c847382d036/FLAG1f4e13659 [2022-11-03 02:30:36,930 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/data/96caa49d7/d9be43bd2e814f9ebcb43c847382d036 [2022-11-03 02:30:36,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:30:36,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:30:36,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:36,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:30:36,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:30:36,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:36" (1/1) ... [2022-11-03 02:30:36,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db0eb71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:36, skipping insertion in model container [2022-11-03 02:30:36,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:36" (1/1) ... [2022-11-03 02:30:36,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:30:36,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:30:37,162 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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2022-11-03 02:30:37,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:37,238 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:30:37,268 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_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2022-11-03 02:30:37,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:37,302 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:30:37,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37 WrapperNode [2022-11-03 02:30:37,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:37,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:37,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:30:37,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:30:37,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,350 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2022-11-03 02:30:37,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:37,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:30:37,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:30:37,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:30:37,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:30:37,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:30:37,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:30:37,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:30:37,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (1/1) ... [2022-11-03 02:30:37,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:37,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:30:37,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:30:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:30:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:30:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:30:37,457 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:30:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:30:37,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:30:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:30:37,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:30:37,545 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:30:37,547 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:30:38,126 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:30:38,131 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:30:38,132 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:30:38,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:38 BoogieIcfgContainer [2022-11-03 02:30:38,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:30:38,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:30:38,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:30:38,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:30:38,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:30:36" (1/3) ... [2022-11-03 02:30:38,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72de5d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:38, skipping insertion in model container [2022-11-03 02:30:38,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:37" (2/3) ... [2022-11-03 02:30:38,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72de5d49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:38, skipping insertion in model container [2022-11-03 02:30:38,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:38" (3/3) ... [2022-11-03 02:30:38,142 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-11-03 02:30:38,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:30:38,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:30:38,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:30:38,214 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;@11188ec6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:30:38,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:30:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-03 02:30:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:30:38,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:38,229 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:38,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:38,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:38,238 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2022-11-03 02:30:38,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:38,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674911716] [2022-11-03 02:30:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:38,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:38,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:38,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:38,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:30:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:30:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:38,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:38,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:38,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674911716] [2022-11-03 02:30:38,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674911716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:38,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:38,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:30:38,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815137110] [2022-11-03 02:30:38,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:38,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:30:38,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:30:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:30:38,714 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:38,749 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2022-11-03 02:30:38,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:30:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-11-03 02:30:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:38,760 INFO L225 Difference]: With dead ends: 61 [2022-11-03 02:30:38,761 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 02:30:38,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 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 02:30:38,771 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:38,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 02:30:38,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-03 02:30:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:30:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-03 02:30:38,832 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2022-11-03 02:30:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:38,834 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-03 02:30:38,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-03 02:30:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:30:38,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:38,838 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:38,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:39,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:39,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:39,050 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2022-11-03 02:30:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:39,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470231439] [2022-11-03 02:30:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:39,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:39,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:39,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:39,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:30:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:30:39,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:30:41,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:30:42,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:42,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470231439] [2022-11-03 02:30:42,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470231439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:42,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [840096952] [2022-11-03 02:30:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:42,524 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:42,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:42,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-03 02:30:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:42,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:43,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:43,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [840096952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:43,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:43,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 15 [2022-11-03 02:30:43,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428626502] [2022-11-03 02:30:43,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:43,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:30:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:30:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:30:43,508 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:30:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:45,908 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-11-03 02:30:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:30:45,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-03 02:30:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:45,912 INFO L225 Difference]: With dead ends: 45 [2022-11-03 02:30:45,912 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 02:30:45,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:30:45,914 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:45,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 126 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:30:45,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 02:30:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-11-03 02:30:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-03 02:30:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2022-11-03 02:30:45,930 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 29 [2022-11-03 02:30:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:45,931 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2022-11-03 02:30:45,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:30:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2022-11-03 02:30:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:30:45,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:45,933 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:45,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:46,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:46,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:46,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2022-11-03 02:30:46,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:46,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410491256] [2022-11-03 02:30:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:46,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:46,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:46,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:30:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:30:46,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:30:51,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:30:53,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:53,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410491256] [2022-11-03 02:30:53,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410491256] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:30:53,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:30:53,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-11-03 02:30:53,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464134013] [2022-11-03 02:30:53,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:53,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:53,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:53,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:53,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:30:53,984 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:30:59,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:00,759 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2022-11-03 02:31:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:31:00,768 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-03 02:31:00,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:00,771 INFO L225 Difference]: With dead ends: 60 [2022-11-03 02:31:00,771 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 02:31:00,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:31:00,772 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:00,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-03 02:31:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 02:31:00,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-11-03 02:31:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:31:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-11-03 02:31:00,789 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 30 [2022-11-03 02:31:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:00,790 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-11-03 02:31:00,790 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:31:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-11-03 02:31:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:31:00,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:00,792 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:00,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:00,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:00,995 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash 692401170, now seen corresponding path program 1 times [2022-11-03 02:31:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:00,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609418722] [2022-11-03 02:31:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:00,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:00,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:00,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:00,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:31:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:01,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:31:03,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:31:04,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:04,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609418722] [2022-11-03 02:31:04,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609418722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:04,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267062022] [2022-11-03 02:31:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:04,283 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:04,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:04,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:04,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:31:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:31:04,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:31:05,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:05,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267062022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:05,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747940407] [2022-11-03 02:31:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:05,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:05,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:05,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:05,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:31:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:05,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:31:05,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:31:05,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:31:06,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747940407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:06,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:31:06,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6, 6, 6, 6] total 12 [2022-11-03 02:31:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173887101] [2022-11-03 02:31:06,023 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:06,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:31:06,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:31:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:06,025 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-03 02:31:08,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:09,871 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-11-03 02:31:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:31:09,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 34 [2022-11-03 02:31:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:09,887 INFO L225 Difference]: With dead ends: 60 [2022-11-03 02:31:09,888 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:31:09,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:31:09,889 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:09,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 188 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 23 Unchecked, 3.5s Time] [2022-11-03 02:31:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:31:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-03 02:31:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:31:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-11-03 02:31:09,923 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 34 [2022-11-03 02:31:09,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:09,925 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-11-03 02:31:09,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-03 02:31:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-11-03 02:31:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 02:31:09,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:09,928 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:09,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:10,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:10,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:10,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:10,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2022-11-03 02:31:10,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:10,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711933681] [2022-11-03 02:31:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:10,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:10,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:10,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:10,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:31:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:10,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:31:10,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:31:11,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:31:19,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:19,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711933681] [2022-11-03 02:31:19,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711933681] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:19,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:31:19,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-03 02:31:19,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367556263] [2022-11-03 02:31:19,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:19,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:31:19,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:31:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:31:19,966 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:31:26,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:31:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:29,743 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-11-03 02:31:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:31:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-11-03 02:31:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:29,762 INFO L225 Difference]: With dead ends: 55 [2022-11-03 02:31:29,762 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 02:31:29,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:31:29,764 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:29,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2022-11-03 02:31:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 02:31:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-11-03 02:31:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:31:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-11-03 02:31:29,780 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 35 [2022-11-03 02:31:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:29,780 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-11-03 02:31:29,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:31:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-11-03 02:31:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:31:29,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:29,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:29,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:30,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:30,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2022-11-03 02:31:30,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:30,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570000353] [2022-11-03 02:31:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:30,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:30,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:30,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:31:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:31:30,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:31:43,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:56,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:56,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570000353] [2022-11-03 02:31:56,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570000353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:31:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1560262789] [2022-11-03 02:31:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:56,585 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:56,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:56,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:56,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:31:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:31:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:32:11,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:32:11,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1560262789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:32:11,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:32:11,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-11-03 02:32:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100028410] [2022-11-03 02:32:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:32:11,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:32:11,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:11,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:32:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:32:11,838 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:32:17,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:32:21,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 02:32:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:22,099 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-11-03 02:32:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:32:22,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-11-03 02:32:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:22,115 INFO L225 Difference]: With dead ends: 59 [2022-11-03 02:32:22,116 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 02:32:22,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:32:22,117 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:22,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 107 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-11-03 02:32:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 02:32:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-11-03 02:32:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:32:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-11-03 02:32:22,135 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 45 [2022-11-03 02:32:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:22,136 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-11-03 02:32:22,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:32:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-11-03 02:32:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:32:22,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:22,138 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:22,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:22,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:22,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:22,553 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash -137832731, now seen corresponding path program 1 times [2022-11-03 02:32:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:22,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30626509] [2022-11-03 02:32:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:22,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:22,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:22,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:22,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eb2b043-1ee3-48cd-9d5a-c32b3c47d13e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:32:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:32:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates...